616655561165 has 32 divisors (see below), whose sum is σ = 887398778880. Its totient is φ = 402205091904.

The previous prime is 616655561023. The next prime is 616655561191. The reversal of 616655561165 is 561165556616.

It is not a de Polignac number, because 616655561165 - 2²⁴ = 616638783949 is a prime.

It is a super-2 number, since 2×616655561165² (a number of 24 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1995659 + ... + 2283848.

It is an arithmetic number, because the mean of its divisors is an integer number (27731211840).

Almost surely, 2^616655561165 is an apocalyptic number.

It is an amenable number.

616655561165 is a deficient number, since it is larger than the sum of its proper divisors (270743217715).

616655561165 is a wasteful number, since it uses less digits than its factorization.

616655561165 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4279721.

The product of its digits is 4860000, while the sum is 53.

The spelling of 616655561165 in words is "six hundred sixteen billion, six hundred fifty-five million, five hundred sixty-one thousand, one hundred sixty-five".