1945550826 has 64 divisors (see below), whose sum is σ = 4418789760. Its totient is φ = 642301488.

The previous prime is 1945550801. The next prime is 1945550851. The reversal of 1945550826 is 6280555491.

1945550826 is a `hidden beast` number, since 1 + 94 + 5 + 550 + 8 + 2 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (1945550801) and next prime (1945550851).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 465940 + ... + 470096.

It is an arithmetic number, because the mean of its divisors is an integer number (69043590).

Almost surely, 2^1945550826 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1945550826, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2209394880).

1945550826 is an abundant number, since it is smaller than the sum of its proper divisors (2473238934).

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

1945550826 is an equidigital number, since it uses as much as digits as its factorization.

1945550826 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4287 (or 4269 counting only the distinct ones).

The product of its (nonzero) digits is 432000, while the sum is 45.

The square root of 1945550826 is about 44108.3985880240. The cubic root of 1945550826 is about 1248.3820829925.

The spelling of 1945550826 in words is "one billion, nine hundred forty-five million, five hundred fifty thousand, eight hundred twenty-six".