65117156551615 has 16 divisors (see below), whose sum is σ = 92382961020480. Its totient is φ = 43112048474880.

The previous prime is 65117156551613. The next prime is 65117156551703. The reversal of 65117156551615 is 51615565171156.

It is not a de Polignac number, because 65117156551615 - 2¹ = 65117156551613 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65117156551613) 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, 32077416006 + ... + 32077418035.

It is an arithmetic number, because the mean of its divisors is an integer number (5773935063780).

Almost surely, 2^{65117156551615} is an apocalyptic number.

65117156551615 is a deficient number, since it is larger than the sum of its proper divisors (27265804468865).

65117156551615 is a wasteful number, since it uses less digits than its factorization.

65117156551615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64154834082.

The product of its digits is 4725000, while the sum is 55.

The spelling of 65117156551615 in words is "sixty-five trillion, one hundred seventeen billion, one hundred fifty-six million, five hundred fifty-one thousand, six hundred fifteen".