39967888947 has 24 divisors (see below), whose sum is σ = 65637545616. Its totient is φ = 21495333888.

The previous prime is 39967888921. The next prime is 39967888993. The reversal of 39967888947 is 74988876993.

It is not a de Polignac number, because 39967888947 - 2²⁰ = 39966840371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (39967888547) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7994278 + ... + 7999275.

It is an arithmetic number, because the mean of its divisors is an integer number (2734897734).

Almost surely, 2^39967888947 is an apocalyptic number.

39967888947 is a deficient number, since it is larger than the sum of its proper divisors (25669656669).

39967888947 is a wasteful number, since it uses less digits than its factorization.

39967888947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15993587 (or 15993580 counting only the distinct ones).

The product of its digits is 1316818944, while the sum is 78.

The spelling of 39967888947 in words is "thirty-nine billion, nine hundred sixty-seven million, eight hundred eighty-eight thousand, nine hundred forty-seven".