61115505656 has 8 divisors (see below), whose sum is σ = 114591573120. Its totient is φ = 30557752824.

The previous prime is 61115505601. The next prime is 61115505691. The reversal of 61115505656 is 65650551116.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3819719096 + ... + 3819719111.

It is an arithmetic number, because the mean of its divisors is an integer number (14323946640).

Almost surely, 2^61115505656 is an apocalyptic number.

It is an amenable number.

61115505656 is a deficient number, since it is larger than the sum of its proper divisors (53476067464).

61115505656 is a wasteful number, since it uses less digits than its factorization.

61115505656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7639438213 (or 7639438209 counting only the distinct ones).

The product of its (nonzero) digits is 135000, while the sum is 41.

The spelling of 61115505656 in words is "sixty-one billion, one hundred fifteen million, five hundred five thousand, six hundred fifty-six".