51550165560 has 64 divisors (see below), whose sum is σ = 163747591200. Its totient is φ = 12938080256.

The previous prime is 51550165501. The next prime is 51550165567. The reversal of 51550165560 is 6556105515.

It is a super-2 number, since 2×51550165560² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51550165567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12632805 + ... + 12636884.

Almost surely, 2^51550165560 is an apocalyptic number.

It is an amenable number.

51550165560 is an abundant number, since it is smaller than the sum of its proper divisors (112197425640).

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

51550165560 is a wasteful number, since it uses less digits than its factorization.

51550165560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25269720 (or 25269716 counting only the distinct ones).

The product of its (nonzero) digits is 112500, while the sum is 39.

The spelling of 51550165560 in words is "fifty-one billion, five hundred fifty million, one hundred sixty-five thousand, five hundred sixty".