651615165056 has 32 divisors (see below), whose sum is σ = 1325759590080. Its totient is φ = 318875503360.

The previous prime is 651615164969. The next prime is 651615165119. The reversal of 651615165056 is 650561516156.

It is a tau number, because it is divible by the number of its divisors (32).

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 651615165056.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54150830 + ... + 54162861.

It is an arithmetic number, because the mean of its divisors is an integer number (41429987190).

Almost surely, 2^651615165056 is an apocalyptic number.

It is an amenable number.

651615165056 is an abundant number, since it is smaller than the sum of its proper divisors (674144425024).

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

651615165056 is a wasteful number, since it uses less digits than its factorization.

651615165056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108313752 (or 108313740 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 47.

The spelling of 651615165056 in words is "six hundred fifty-one billion, six hundred fifteen million, one hundred sixty-five thousand, fifty-six".