61508136161 has 16 divisors (see below), whose sum is σ = 63722850048. Its totient is φ = 59340124800.

The previous prime is 61508136103. The next prime is 61508136187. The reversal of 61508136161 is 16163180516.

61508136161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61508136161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61508136761) 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, 919976 + ... + 984566.

It is an arithmetic number, because the mean of its divisors is an integer number (3982678128).

Almost surely, 2^61508136161 is an apocalyptic number.

61508136161 is a gapful number since it is divisible by the number (61) formed by its first and last digit.

It is an amenable number.

61508136161 is a deficient number, since it is larger than the sum of its proper divisors (2214713887).

61508136161 is a wasteful number, since it uses less digits than its factorization.

61508136161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64952.

The product of its (nonzero) digits is 25920, while the sum is 38.

The spelling of 61508136161 in words is "sixty-one billion, five hundred eight million, one hundred thirty-six thousand, one hundred sixty-one".