51812384072 has 16 divisors (see below), whose sum is σ = 97181568060. Its totient is φ = 25897299264.

The previous prime is 51812384047. The next prime is 51812384089. The reversal of 51812384072 is 27048321815.

It can be written as a sum of positive squares in 2 ways, for example, as 51399237796 + 413146276 = 226714^2 + 20326^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1086803 + ... + 1133474.

Almost surely, 2^51812384072 is an apocalyptic number.

It is an amenable number.

51812384072 is a deficient number, since it is larger than the sum of its proper divisors (45369183988).

51812384072 is a wasteful number, since it uses less digits than its factorization.

51812384072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2223200 (or 2223196 counting only the distinct ones).

The product of its (nonzero) digits is 107520, while the sum is 41.

The spelling of 51812384072 in words is "fifty-one billion, eight hundred twelve million, three hundred eighty-four thousand, seventy-two".