651796920 has 96 divisors (see below), whose sum is σ = 2138263920. Its totient is φ = 172177920.

The previous prime is 651796913. The next prime is 651796933. The reversal of 651796920 is 29697156.

It is a happy number.

651796920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 30060 + ... + 46980.

Almost surely, 2^651796920 is an apocalyptic number.

651796920 is a gapful number since it is divisible by the number (60) 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 651796920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1069131960).

651796920 is an abundant number, since it is smaller than the sum of its proper divisors (1486467000).

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

651796920 is a wasteful number, since it uses less digits than its factorization.

651796920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17045 (or 17038 counting only the distinct ones).

The product of its (nonzero) digits is 204120, while the sum is 45.

The square root of 651796920 is about 25530.3137466033. The cubic root of 651796920 is about 867.0366080095.

The spelling of 651796920 in words is "six hundred fifty-one million, seven hundred ninety-six thousand, nine hundred twenty".