61115111055 has 12 divisors (see below), whose sum is σ = 105932859240. Its totient is φ = 32594725872.

The previous prime is 61115111051. The next prime is 61115111077. The reversal of 61115111055 is 55011151116.

It is not a de Polignac number, because 61115111055 - 2² = 61115111051 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61115111051) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 679056745 + ... + 679056834.

It is an arithmetic number, because the mean of its divisors is an integer number (8827738270).

Almost surely, 2^61115111055 is an apocalyptic number.

61115111055 is a deficient number, since it is larger than the sum of its proper divisors (44817748185).

61115111055 is a wasteful number, since it uses less digits than its factorization.

61115111055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1358113590 (or 1358113587 counting only the distinct ones).

The product of its (nonzero) digits is 750, while the sum is 27.

The spelling of 61115111055 in words is "sixty-one billion, one hundred fifteen million, one hundred eleven thousand, fifty-five".