61081235955 has 96 divisors (see below), whose sum is σ = 111368245248. Its totient is φ = 30932755200.

The previous prime is 61081235927. The next prime is 61081235959. The reversal of 61081235955 is 55953218016.

61081235955 is a `hidden beast` number, since 610 + 8 + 1 + 23 + 5 + 9 + 5 + 5 = 666.

It is not a de Polignac number, because 61081235955 - 2⁵ = 61081235923 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 61081235955.

It is not an unprimeable number, because it can be changed into a prime (61081235959) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 33727000 + ... + 33728810.

It is an arithmetic number, because the mean of its divisors is an integer number (1160085888).

Almost surely, 2^61081235955 is an apocalyptic number.

61081235955 is a deficient number, since it is larger than the sum of its proper divisors (50287009293).

61081235955 is a wasteful number, since it uses less digits than its factorization.

61081235955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2337 (or 2334 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The spelling of 61081235955 in words is "sixty-one billion, eighty-one million, two hundred thirty-five thousand, nine hundred fifty-five".