51615565171156 has 48 divisors (see below), whose sum is σ = 105350187846400. Its totient is φ = 22118373557280.

The previous prime is 51615565171151. The next prime is 51615565171217. The reversal of 51615565171156 is 65117156551615.

It is a junction number, because it is equal to n+sod(n) for n = 51615565171097 and 51615565171106.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51615565171151) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9581041 + ... + 13965223.

Almost surely, 2^{51615565171156} is an apocalyptic number.

It is an amenable number.

51615565171156 is an abundant number, since it is smaller than the sum of its proper divisors (53734622675244).

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

51615565171156 is a wasteful number, since it uses less digits than its factorization.

51615565171156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4392789 (or 4392773 counting only the distinct ones).

The product of its digits is 4725000, while the sum is 55.

The spelling of 51615565171156 in words is "fifty-one trillion, six hundred fifteen billion, five hundred sixty-five million, one hundred seventy-one thousand, one hundred fifty-six".