61751773992 has 64 divisors (see below), whose sum is σ = 162572155200. Its totient is φ = 19492462080.

The previous prime is 61751773987. The next prime is 61751774017. The reversal of 61751773992 is 29937715716.

It is a Harshad number since it is a multiple of its sum of digits (57).

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, 1122718 + ... + 1176434.

It is an arithmetic number, because the mean of its divisors is an integer number (2540189925).

Almost surely, 2^61751773992 is an apocalyptic number.

It is an amenable number.

61751773992 is an abundant number, since it is smaller than the sum of its proper divisors (100820381208).

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

61751773992 is a wasteful number, since it uses less digits than its factorization.

61751773992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56266 (or 56262 counting only the distinct ones).

The product of its digits is 5000940, while the sum is 57.

The spelling of 61751773992 in words is "sixty-one billion, seven hundred fifty-one million, seven hundred seventy-three thousand, nine hundred ninety-two".