51538511908 has 48 divisors (see below), whose sum is σ = 97481151936. Its totient is φ = 23701242240.

The previous prime is 51538511863. The next prime is 51538511911. The reversal of 51538511908 is 80911583515.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

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, 29738610 + ... + 29740342.

It is an arithmetic number, because the mean of its divisors is an integer number (2030857332).

Almost surely, 2^51538511908 is an apocalyptic number.

It is an amenable number.

51538511908 is a deficient number, since it is larger than the sum of its proper divisors (45942640028).

51538511908 is a wasteful number, since it uses less digits than its factorization.

51538511908 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3484 (or 3482 counting only the distinct ones).

The product of its (nonzero) digits is 216000, while the sum is 46.

The spelling of 51538511908 in words is "fifty-one billion, five hundred thirty-eight million, five hundred eleven thousand, nine hundred eight".