51655110651564 has 24 divisors (see below), whose sum is σ = 137746961737728. Its totient is φ = 14758603043280.

The previous prime is 51655110651563. The next prime is 51655110651631. The reversal of 51655110651564 is 46515601155615.

It is not an unprimeable number, because it can be changed into a prime (51655110651563) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 307470896652 + ... + 307470896819.

It is an arithmetic number, because the mean of its divisors is an integer number (5739456739072).

Almost surely, 2^{51655110651564} is an apocalyptic number.

It is an amenable number.

51655110651564 is an abundant number, since it is smaller than the sum of its proper divisors (86091851086164).

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

51655110651564 is a wasteful number, since it uses less digits than its factorization.

51655110651564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 614941793485 (or 614941793483 counting only the distinct ones).

The product of its (nonzero) digits is 2700000, while the sum is 51.

The spelling of 51655110651564 in words is "fifty-one trillion, six hundred fifty-five billion, one hundred ten million, six hundred fifty-one thousand, five hundred sixty-four".