51051555057 has 16 divisors (see below), whose sum is σ = 68367991680. Its totient is φ = 33885046272.

The previous prime is 51051555013. The next prime is 51051555073. The reversal of 51051555057 is 75055515015.

It is not a de Polignac number, because 51051555057 - 2²² = 51047360753 is a prime.

It is a super-2 number, since 2×51051555057² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (51051553057) 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, 647919 + ... + 722427.

It is an arithmetic number, because the mean of its divisors is an integer number (4272999480).

Almost surely, 2^51051555057 is an apocalyptic number.

It is an amenable number.

51051555057 is a deficient number, since it is larger than the sum of its proper divisors (17316436623).

51051555057 is a wasteful number, since it uses less digits than its factorization.

51051555057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75512.

The product of its (nonzero) digits is 109375, while the sum is 39.

The spelling of 51051555057 in words is "fifty-one billion, fifty-one million, five hundred fifty-five thousand, fifty-seven".