1955143008 has 384 divisors, whose sum is σ = 7128253440. Its totient is φ = 513962496.

The previous prime is 1955143007. The next prime is 1955143009. The reversal of 1955143008 is 8003415591.

It is an interprime number because it is at equal distance from previous prime (1955143007) and next prime (1955143009).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1955143007) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 6368391 + ... + 6368697.

It is an arithmetic number, because the mean of its divisors is an integer number (18563160).

Almost surely, 2^1955143008 is an apocalyptic number.

1955143008 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1955143008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3564126720).

1955143008 is an abundant number, since it is smaller than the sum of its proper divisors (5173110432).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1955143008 is an equidigital number, since it uses as much as digits as its factorization.

1955143008 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 332 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 36.

The square root of 1955143008 is about 44216.9990840627. Note that the first 3 decimals coincide. The cubic root of 1955143008 is about 1250.4303601884.

Adding to 1955143008 its reverse (8003415591), we get a palindrome (9958558599).

The spelling of 1955143008 in words is "one billion, nine hundred fifty-five million, one hundred forty-three thousand, eight".