51642367464 has 16 divisors (see below), whose sum is σ = 129105918720. Its totient is φ = 17214122480.

The previous prime is 51642367463. The next prime is 51642367471. The reversal of 51642367464 is 46476324615.

It is not an unprimeable number, because it can be changed into a prime (51642367463) 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, 1075882632 + ... + 1075882679.

It is an arithmetic number, because the mean of its divisors is an integer number (8069119920).

Almost surely, 2^51642367464 is an apocalyptic number.

It is an amenable number.

51642367464 is an abundant number, since it is smaller than the sum of its proper divisors (77463551256).

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

51642367464 is a wasteful number, since it uses less digits than its factorization.

51642367464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2151765320 (or 2151765316 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 48.

The spelling of 51642367464 in words is "fifty-one billion, six hundred forty-two million, three hundred sixty-seven thousand, four hundred sixty-four".