51267542464 has 28 divisors (see below), whose sum is σ = 107718386544. Its totient is φ = 24125901824.

The previous prime is 51267542461. The next prime is 51267542507. The reversal of 51267542464 is 46424576215.

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 a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51267542461) 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, 23559364 + ... + 23561539.

Almost surely, 2^51267542464 is an apocalyptic number.

It is an amenable number.

51267542464 is an abundant number, since it is smaller than the sum of its proper divisors (56450844080).

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

51267542464 is a wasteful number, since it uses less digits than its factorization.

51267542464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47120932 (or 47120922 counting only the distinct ones).

The product of its digits is 1612800, while the sum is 46.

The spelling of 51267542464 in words is "fifty-one billion, two hundred sixty-seven million, five hundred forty-two thousand, four hundred sixty-four".