39918988874 has 4 divisors (see below), whose sum is σ = 59878483314. Its totient is φ = 19959494436.

The previous prime is 39918988831. The next prime is 39918988891. The reversal of 39918988874 is 47888981993.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 32322646225 + 7596342649 = 179785^2 + 87157^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9979747217 + ... + 9979747220.

Almost surely, 2^39918988874 is an apocalyptic number.

39918988874 is a deficient number, since it is larger than the sum of its proper divisors (19959494440).

39918988874 is a wasteful number, since it uses less digits than its factorization.

39918988874 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19959494439.

The product of its digits is 250822656, while the sum is 74.

The spelling of 39918988874 in words is "thirty-nine billion, nine hundred eighteen million, nine hundred eighty-eight thousand, eight hundred seventy-four".