51239099356 has 24 divisors (see below), whose sum is σ = 94966421760. Its totient is φ = 24106578432.

The previous prime is 51239099291. The next prime is 51239099423. The reversal of 51239099356 is 65399093215.

It is a super-2 number, since 2×51239099356² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

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, 191685 + ... + 373123.

It is an arithmetic number, because the mean of its divisors is an integer number (3956934240).

Almost surely, 2^51239099356 is an apocalyptic number.

It is an amenable number.

51239099356 is a deficient number, since it is larger than the sum of its proper divisors (43727322404).

51239099356 is a wasteful number, since it uses less digits than its factorization.

51239099356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185613 (or 185611 counting only the distinct ones).

The product of its (nonzero) digits is 1968300, while the sum is 52.

The spelling of 51239099356 in words is "fifty-one billion, two hundred thirty-nine million, ninety-nine thousand, three hundred fifty-six".