39977777992 has 16 divisors (see below), whose sum is σ = 74964466800. Its totient is φ = 19987253520.

The previous prime is 39977777969. The next prime is 39977778023. The reversal of 39977777992 is 29977777993.

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 in 3 ways as a sum of consecutive naturals, for example, 97242 + ... + 299017.

It is an arithmetic number, because the mean of its divisors is an integer number (4685279175).

Almost surely, 2^39977777992 is an apocalyptic number.

It is an amenable number.

39977777992 is a deficient number, since it is larger than the sum of its proper divisors (34986688808).

39977777992 is a wasteful number, since it uses less digits than its factorization.

39977777992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408876 (or 408872 counting only the distinct ones).

The product of its digits is 661624362, while the sum is 76.

Subtracting from 39977777992 its reverse (29977777993), we obtain a palindrome (9999999999).

The spelling of 39977777992 in words is "thirty-nine billion, nine hundred seventy-seven million, seven hundred seventy-seven thousand, nine hundred ninety-two".