651226656 has 24 divisors (see below), whose sum is σ = 1709470224. Its totient is φ = 217075520.

The previous prime is 651226619. The next prime is 651226679. The reversal of 651226656 is 656622156.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 3391710 + ... + 3391901.

It is an arithmetic number, because the mean of its divisors is an integer number (71227926).

Almost surely, 2^651226656 is an apocalyptic number.

It is an amenable number.

651226656 is an abundant number, since it is smaller than the sum of its proper divisors (1058243568).

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

651226656 is a wasteful number, since it uses less digits than its factorization.

651226656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6783624 (or 6783616 counting only the distinct ones).

The product of its digits is 129600, while the sum is 39.

The square root of 651226656 is about 25519.1429323165. The cubic root of 651226656 is about 866.7836744060.

The spelling of 651226656 in words is "six hundred fifty-one million, two hundred twenty-six thousand, six hundred fifty-six".