61636606680 has 64 divisors (see below), whose sum is σ = 201719808000. Its totient is φ = 14942207360.

The previous prime is 61636606673. The next prime is 61636606693. The reversal of 61636606680 is 8660663616.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23345880 + ... + 23348519.

It is an arithmetic number, because the mean of its divisors is an integer number (3151872000).

Almost surely, 2^61636606680 is an apocalyptic number.

61636606680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

61636606680 is an abundant number, since it is smaller than the sum of its proper divisors (140083201320).

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

61636606680 is a wasteful number, since it uses less digits than its factorization.

61636606680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46694424 (or 46694420 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 48.

The spelling of 61636606680 in words is "sixty-one billion, six hundred thirty-six million, six hundred six thousand, six hundred eighty".