61165020665015 has 16 divisors (see below), whose sum is σ = 74151677199360. Its totient is φ = 48431411965440.

The previous prime is 61165020664999. The next prime is 61165020665039. The reversal of 61165020665015 is 51056602056116.

It is a happy number.

It is not a de Polignac number, because 61165020665015 - 2⁴ = 61165020664999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 114130370 + ... + 114665039.

It is an arithmetic number, because the mean of its divisors is an integer number (4634479824960).

Almost surely, 2^{61165020665015} is an apocalyptic number.

61165020665015 is a deficient number, since it is larger than the sum of its proper divisors (12986656534345).

61165020665015 is a wasteful number, since it uses less digits than its factorization.

61165020665015 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228795962.

The product of its (nonzero) digits is 324000, while the sum is 44.

The spelling of 61165020665015 in words is "sixty-one trillion, one hundred sixty-five billion, twenty million, six hundred sixty-five thousand, fifteen".