51318508995 has 24 divisors (see below), whose sum is σ = 95794551216. Its totient is φ = 25264496448.

The previous prime is 51318508993. The next prime is 51318509017. The reversal of 51318508995 is 59980581315.

It is a happy number.

It is not a de Polignac number, because 51318508995 - 2¹ = 51318508993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51318508993) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 43861389 + ... + 43862558.

It is an arithmetic number, because the mean of its divisors is an integer number (3991439634).

Almost surely, 2^51318508995 is an apocalyptic number.

51318508995 is a deficient number, since it is larger than the sum of its proper divisors (44476042221).

51318508995 is a wasteful number, since it uses less digits than its factorization.

51318508995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87723971 (or 87723968 counting only the distinct ones).

The product of its (nonzero) digits is 1944000, while the sum is 54.

The spelling of 51318508995 in words is "fifty-one billion, three hundred eighteen million, five hundred eight thousand, nine hundred ninety-five".