51111072392 has 16 divisors (see below), whose sum is σ = 95841545100. Its totient is φ = 25553327040.

The previous prime is 51111072349. The next prime is 51111072437. The reversal of 51111072392 is 29327011115.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 50852956036 + 258116356 = 225506^2 + 16066^2 .

It is a super-2 number, since 2×51111072392² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 175667 + ... + 364802.

Almost surely, 2^51111072392 is an apocalyptic number.

It is an amenable number.

51111072392 is a deficient number, since it is larger than the sum of its proper divisors (44730472708).

51111072392 is a wasteful number, since it uses less digits than its factorization.

51111072392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552296 (or 552292 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 32.

The spelling of 51111072392 in words is "fifty-one billion, one hundred eleven million, seventy-two thousand, three hundred ninety-two".