61155560155655 has 32 divisors (see below), whose sum is σ = 84548001844224. Its totient is φ = 41597733943296.

The previous prime is 61155560155639. The next prime is 61155560155699. The reversal of 61155560155655 is 55655106555116.

It is a cyclic number.

It is not a de Polignac number, because 61155560155655 - 2⁴ = 61155560155639 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 61155560155655.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10701227 + ... + 15389196.

It is an arithmetic number, because the mean of its divisors is an integer number (2642125057632).

Almost surely, 2^{61155560155655} is an apocalyptic number.

61155560155655 is a deficient number, since it is larger than the sum of its proper divisors (23392441688569).

61155560155655 is a wasteful number, since it uses less digits than its factorization.

61155560155655 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26090975.

The product of its (nonzero) digits is 16875000, while the sum is 56.

The spelling of 61155560155655 in words is "sixty-one trillion, one hundred fifty-five billion, five hundred sixty million, one hundred fifty-five thousand, six hundred fifty-five".