39697221976 has 8 divisors (see below), whose sum is σ = 74432291220. Its totient is φ = 19848610984.

The previous prime is 39697221961. The next prime is 39697222001. The reversal of 39697221976 is 67912279693.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×39697221976² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2481076366 + ... + 2481076381.

Almost surely, 2^39697221976 is an apocalyptic number.

It is an amenable number.

39697221976 is a deficient number, since it is larger than the sum of its proper divisors (34735069244).

39697221976 is a wasteful number, since it uses less digits than its factorization.

39697221976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4962152753 (or 4962152749 counting only the distinct ones).

The product of its digits is 15431472, while the sum is 61.

The spelling of 39697221976 in words is "thirty-nine billion, six hundred ninety-seven million, two hundred twenty-one thousand, nine hundred seventy-six".