61336556664 has 32 divisors (see below), whose sum is σ = 153653725440. Its totient is φ = 20403874400.

The previous prime is 61336556663. The next prime is 61336556681. The reversal of 61336556664 is 46665563316.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61336556663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2590752 + ... + 2614319.

It is an arithmetic number, because the mean of its divisors is an integer number (4801678920).

Almost surely, 2^61336556664 is an apocalyptic number.

It is an amenable number.

61336556664 is an abundant number, since it is smaller than the sum of its proper divisors (92317168776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

61336556664 is a wasteful number, since it uses less digits than its factorization.

61336556664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5205571 (or 5205567 counting only the distinct ones).

The product of its digits is 6998400, while the sum is 51.

The spelling of 61336556664 in words is "sixty-one billion, three hundred thirty-six million, five hundred fifty-six thousand, six hundred sixty-four".