61164215161 has 32 divisors (see below), whose sum is σ = 75134304000. Its totient is φ = 49633032960.

The previous prime is 61164215137. The next prime is 61164215183. The reversal of 61164215161 is 16151246116.

It is not a de Polignac number, because 61164215161 - 2⁵ = 61164215129 is a prime.

It is a super-2 number, since 2×61164215161² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61164219161) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14420001 + ... + 14424241.

It is an arithmetic number, because the mean of its divisors is an integer number (2347947000).

Almost surely, 2^61164215161 is an apocalyptic number.

It is an amenable number.

61164215161 is a deficient number, since it is larger than the sum of its proper divisors (13970088839).

61164215161 is a wasteful number, since it uses less digits than its factorization.

61164215161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6494 (or 6480 counting only the distinct ones).

The product of its digits is 8640, while the sum is 34.

The spelling of 61164215161 in words is "sixty-one billion, one hundred sixty-four million, two hundred fifteen thousand, one hundred sixty-one".