1651620000 has 120 divisors (see below), whose sum is σ = 5417840736. Its totient is φ = 440416000.

The previous prime is 1651619971. The next prime is 1651620001. The reversal of 1651620000 is 261561.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is not an unprimeable number, because it can be changed into a prime (1651620001) 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 19 ways as a sum of consecutive naturals, for example, 46237 + ... + 73763.

Almost surely, 2^1651620000 is an apocalyptic number.

1651620000 is a gapful number since it is divisible by the number (10) 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 1651620000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2708920368).

1651620000 is an abundant number, since it is smaller than the sum of its proper divisors (3766220736).

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

1651620000 is an equidigital number, since it uses as much as digits as its factorization.

1651620000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27560 (or 27537 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 1651620000 is about 40640.1279525545. The cubic root of 1651620000 is about 1182.0523509442.

Adding to 1651620000 its reverse (261561), we get a palindrome (1651881561).

The spelling of 1651620000 in words is "one billion, six hundred fifty-one million, six hundred twenty thousand".