61699788976 has 20 divisors (see below), whose sum is σ = 136620961552. Its totient is φ = 26442766656.

The previous prime is 61699788893. The next prime is 61699788979. The reversal of 61699788976 is 67988799616.

It is a super-2 number, since 2×61699788976² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (61699788979) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 275445375 + ... + 275445598.

Almost surely, 2^61699788976 is an apocalyptic number.

It is an amenable number.

61699788976 is an abundant number, since it is smaller than the sum of its proper divisors (74921172576).

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

61699788976 is a wasteful number, since it uses less digits than its factorization.

61699788976 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 550890988 (or 550890982 counting only the distinct ones).

The product of its digits is 493807104, while the sum is 76.

The spelling of 61699788976 in words is "sixty-one billion, six hundred ninety-nine million, seven hundred eighty-eight thousand, nine hundred seventy-six".