61161555501117 has 6 divisors (see below), whose sum is σ = 88344469057182. Its totient is φ = 40774370334072.

The previous prime is 61161555501071. The next prime is 61161555501121. The reversal of 61161555501117 is 71110555516116.

61161555501117 is a `hidden beast` number, since 6 + 1 + 1 + 615 + 5 + 5 + 5 + 0 + 11 + 17 = 666.

It can be written as a sum of positive squares in only one way, i.e., 48586950148356 + 12574605352761 = 6970434^2 + 3546069^2 .

It is a de Polignac number, because none of the positive numbers 2^k-61161555501117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61161555501197) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 3397864194498 + ... + 3397864194515.

It is an arithmetic number, because the mean of its divisors is an integer number (14724078176197).

Almost surely, 2^{61161555501117} is an apocalyptic number.

It is an amenable number.

61161555501117 is a deficient number, since it is larger than the sum of its proper divisors (27182913556065).

61161555501117 is a wasteful number, since it uses less digits than its factorization.

61161555501117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6795728389019 (or 6795728389016 counting only the distinct ones).

The product of its (nonzero) digits is 157500, while the sum is 45.

The spelling of 61161555501117 in words is "sixty-one trillion, one hundred sixty-one billion, five hundred fifty-five million, five hundred one thousand, one hundred seventeen".