61055555507 has 8 divisors (see below), whose sum is σ = 63960427200. Its totient is φ = 58203984384.

The previous prime is 61055555501. The next prime is 61055555537. The reversal of 61055555507 is 70555555016.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-61055555507 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61055555501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13322798 + ... + 13327379.

It is an arithmetic number, because the mean of its divisors is an integer number (7995053400).

Almost surely, 2^61055555507 is an apocalyptic number.

61055555507 is a deficient number, since it is larger than the sum of its proper divisors (2904871693).

61055555507 is a wasteful number, since it uses less digits than its factorization.

61055555507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26650285.

The product of its (nonzero) digits is 656250, while the sum is 44.

The spelling of 61055555507 in words is "sixty-one billion, fifty-five million, five hundred fifty-five thousand, five hundred seven".