651622608 has 120 divisors (see below), whose sum is σ = 2244523008. Its totient is φ = 171853056.

The previous prime is 651622607. The next prime is 651622627. The reversal of 651622608 is 806226156.

It is a super-2 number, since 2×651622608² = 849224046513443328, which contains 22 as substring.

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 (651622607) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 11760 + ... + 37967.

Almost surely, 2^651622608 is an apocalyptic number.

It is an amenable number.

651622608 is an abundant number, since it is smaller than the sum of its proper divisors (1592900400).

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

651622608 is a wasteful number, since it uses less digits than its factorization.

651622608 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49761 (or 49752 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 651622608 is about 25526.8996942441. The cubic root of 651622608 is about 866.9593097206.

The spelling of 651622608 in words is "six hundred fifty-one million, six hundred twenty-two thousand, six hundred eight".