51791520942 has 48 divisors (see below), whose sum is σ = 129444262272. Its totient is φ = 14659278480.

The previous prime is 51791520917. The next prime is 51791520953. The reversal of 51791520942 is 24902519715.

51791520942 is a `hidden beast` number, since 51 + 79 + 1 + 520 + 9 + 4 + 2 = 666.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1907284 + ... + 1934247.

It is an arithmetic number, because the mean of its divisors is an integer number (2696755464).

Almost surely, 2^51791520942 is an apocalyptic number.

51791520942 is an abundant number, since it is smaller than the sum of its proper divisors (77652741330).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51791520942 is a wasteful number, since it uses less digits than its factorization.

51791520942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3841653 (or 3841650 counting only the distinct ones).

The product of its (nonzero) digits is 226800, while the sum is 45.

The spelling of 51791520942 in words is "fifty-one billion, seven hundred ninety-one million, five hundred twenty thousand, nine hundred forty-two".