651587716648 has 32 divisors (see below), whose sum is σ = 1332830388960. Its totient is φ = 296167938880.

The previous prime is 651587716597. The next prime is 651587716651. The reversal of 651587716648 is 846617785156.

651587716648 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 651587716648.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3951990 + ... + 4113562.

It is an arithmetic number, because the mean of its divisors is an integer number (41650949655).

Almost surely, 2^651587716648 is an apocalyptic number.

It is an amenable number.

651587716648 is an abundant number, since it is smaller than the sum of its proper divisors (681242672312).

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

651587716648 is a wasteful number, since it uses less digits than its factorization.

651587716648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 207417 (or 207413 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 64.

The spelling of 651587716648 in words is "six hundred fifty-one billion, five hundred eighty-seven million, seven hundred sixteen thousand, six hundred forty-eight".