51515066667 has 16 divisors (see below), whose sum is σ = 69032660000. Its totient is φ = 34170626304.

The previous prime is 51515066641. The next prime is 51515066683. The reversal of 51515066667 is 76666051515.

It is not a de Polignac number, because 51515066667 - 2⁸ = 51515066411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51515066167) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1039959 + ... + 1088367.

It is an arithmetic number, because the mean of its divisors is an integer number (4314541250).

Almost surely, 2^51515066667 is an apocalyptic number.

51515066667 is a deficient number, since it is larger than the sum of its proper divisors (17517593333).

51515066667 is a wasteful number, since it uses less digits than its factorization.

51515066667 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50190.

The product of its (nonzero) digits is 1134000, while the sum is 48.

The spelling of 51515066667 in words is "fifty-one billion, five hundred fifteen million, sixty-six thousand, six hundred sixty-seven".