61799895990 has 96 divisors (see below), whose sum is σ = 183712029696. Its totient is φ = 14119686720.

The previous prime is 61799895973. The next prime is 61799896019. The reversal of 61799895990 is 9959899716.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1557295 + ... + 1596485.

It is an arithmetic number, because the mean of its divisors is an integer number (1913666976).

Almost surely, 2^61799895990 is an apocalyptic number.

61799895990 is an abundant number, since it is smaller than the sum of its proper divisors (121912133706).

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

61799895990 is a wasteful number, since it uses less digits than its factorization.

61799895990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41714 (or 41711 counting only the distinct ones).

The product of its (nonzero) digits is 99202320, while the sum is 72.

The spelling of 61799895990 in words is "sixty-one billion, seven hundred ninety-nine million, eight hundred ninety-five thousand, nine hundred ninety".