61553056017 has 80 divisors (see below), whose sum is σ = 92773391040. Its totient is φ = 36237659136.

The previous prime is 61553056007. The next prime is 61553056087. The reversal of 61553056017 is 71065035516.

It is not a de Polignac number, because 61553056017 - 2⁴ = 61553056001 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61553056007) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 312451963 + ... + 312452159.

It is an arithmetic number, because the mean of its divisors is an integer number (1159667388).

Almost surely, 2^61553056017 is an apocalyptic number.

It is an amenable number.

61553056017 is a deficient number, since it is larger than the sum of its proper divisors (31220335023).

61553056017 is an equidigital number, since it uses as much as digits as its factorization.

61553056017 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 340 (or 289 counting only the distinct ones).

The product of its (nonzero) digits is 94500, while the sum is 39.

The spelling of 61553056017 in words is "sixty-one billion, five hundred fifty-three million, fifty-six thousand, seventeen".