651215064 has 16 divisors (see below), whose sum is σ = 1628037720. Its totient is φ = 217071680.

The previous prime is 651215057. The next prime is 651215083. The reversal of 651215064 is 460512156.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13566957 + ... + 13567004.

Almost surely, 2^651215064 is an apocalyptic number.

It is an amenable number.

651215064 is an abundant number, since it is smaller than the sum of its proper divisors (976822656).

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

651215064 is a wasteful number, since it uses less digits than its factorization.

651215064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27133970 (or 27133966 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 651215064 is about 25518.9158076906. The cubic root of 651215064 is about 866.7785313856.

The spelling of 651215064 in words is "six hundred fifty-one million, two hundred fifteen thousand, sixty-four".