51107033818 has 4 divisors (see below), whose sum is σ = 76660550730. Its totient is φ = 25553516908.

The previous prime is 51107033807. The next prime is 51107033839. The reversal of 51107033818 is 81833070115.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 34329790089 + 16777243729 = 185283^2 + 129527^2 .

It is a super-2 number, since 2×51107033818² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12776758453 + ... + 12776758456.

Almost surely, 2^51107033818 is an apocalyptic number.

51107033818 is a deficient number, since it is larger than the sum of its proper divisors (25553516912).

51107033818 is a wasteful number, since it uses less digits than its factorization.

51107033818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25553516911.

The product of its (nonzero) digits is 20160, while the sum is 37.

The spelling of 51107033818 in words is "fifty-one billion, one hundred seven million, thirty-three thousand, eight hundred eighteen".