51234437568 has 28 divisors (see below), whose sum is σ = 135557783240. Its totient is φ = 17078145792.

The previous prime is 51234437567. The next prime is 51234437581. The reversal of 51234437568 is 86573443215.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51234437563) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 133422823 + ... + 133423206.

Almost surely, 2^51234437568 is an apocalyptic number.

It is an amenable number.

51234437568 is an abundant number, since it is smaller than the sum of its proper divisors (84323345672).

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

51234437568 is a wasteful number, since it uses less digits than its factorization.

51234437568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 266846044 (or 266846034 counting only the distinct ones).

The product of its digits is 2419200, while the sum is 48.

The spelling of 51234437568 in words is "fifty-one billion, two hundred thirty-four million, four hundred thirty-seven thousand, five hundred sixty-eight".