51501516667 has 4 divisors (see below), whose sum is σ = 51530114536. Its totient is φ = 51472918800.

The previous prime is 51501516629. The next prime is 51501516733. The reversal of 51501516667 is 76661510515.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51501516667 - 2¹⁵ = 51501483899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51501516617) 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, 14296233 + ... + 14299834.

It is an arithmetic number, because the mean of its divisors is an integer number (12882528634).

Almost surely, 2^51501516667 is an apocalyptic number.

51501516667 is a deficient number, since it is larger than the sum of its proper divisors (28597869).

51501516667 is a wasteful number, since it uses less digits than its factorization.

51501516667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28597868.

The product of its (nonzero) digits is 189000, while the sum is 43.

The spelling of 51501516667 in words is "fifty-one billion, five hundred one million, five hundred sixteen thousand, six hundred sixty-seven".