51090913581672 has 32 divisors (see below), whose sum is σ = 128069716373280. Its totient is φ = 16984646871360.

The previous prime is 51090913581637. The next prime is 51090913581797. The reversal of 51090913581672 is 27618531909015.

It is a super-2 number, since 2×51090913581672² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (57) coincides with the sum of the digits of its prime factors.

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, 2853594354 + ... + 2853612257.

It is an arithmetic number, because the mean of its divisors is an integer number (4002178636665).

Almost surely, 2^{51090913581672} is an apocalyptic number.

It is an amenable number.

51090913581672 is an abundant number, since it is smaller than the sum of its proper divisors (76978802791608).

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

51090913581672 is a wasteful number, since it uses less digits than its factorization.

51090913581672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5707206993 (or 5707206989 counting only the distinct ones).

The product of its (nonzero) digits is 4082400, while the sum is 57.

The spelling of 51090913581672 in words is "fifty-one trillion, ninety billion, nine hundred thirteen million, five hundred eighty-one thousand, six hundred seventy-two".