616155616161 has 24 divisors (see below), whose sum is σ = 895358004840. Its totient is φ = 408299786496.

The previous prime is 616155616123. The next prime is 616155616169. The reversal of 616155616161 is 161616551616.

616155616161 is a `hidden beast` number, since 6 + 1 + 6 + 15 + 5 + 616 + 16 + 1 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 429601593600 + 186554022561 = 655440^2 + 431919^2 .

It is not a de Polignac number, because 616155616161 - 2¹⁴ = 616155599777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (616155616169) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6895155 + ... + 6983943.

It is an arithmetic number, because the mean of its divisors is an integer number (37306583535).

Almost surely, 2^616155616161 is an apocalyptic number.

It is an amenable number.

616155616161 is a deficient number, since it is larger than the sum of its proper divisors (279202388679).

616155616161 is a wasteful number, since it uses less digits than its factorization.

616155616161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93425 (or 93422 counting only the distinct ones).

The product of its digits is 194400, while the sum is 45.

The spelling of 616155616161 in words is "six hundred sixteen billion, one hundred fifty-five million, six hundred sixteen thousand, one hundred sixty-one".