51387788930 has 32 divisors (see below), whose sum is σ = 97433962560. Its totient is φ = 19459742400.

The previous prime is 51387788927. The next prime is 51387788951. The reversal of 51387788930 is 3988778315.

It is a super-2 number, since 2×51387788930² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 51387788930.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182492 + ... + 368888.

It is an arithmetic number, because the mean of its divisors is an integer number (3044811330).

Almost surely, 2^51387788930 is an apocalyptic number.

51387788930 is a deficient number, since it is larger than the sum of its proper divisors (46046173630).

51387788930 is a wasteful number, since it uses less digits than its factorization.

51387788930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187874.

The product of its (nonzero) digits is 10160640, while the sum is 59.

The spelling of 51387788930 in words is "fifty-one billion, three hundred eighty-seven million, seven hundred eighty-eight thousand, nine hundred thirty".