12377977538 has 32 divisors (see below), whose sum is σ = 20555389440. Its totient is φ = 5567028480.

The previous prime is 12377977499. The next prime is 12377977541. The reversal of 12377977538 is 83577977321.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 36695 + ... + 161562.

It is an arithmetic number, because the mean of its divisors is an integer number (642355920).

Almost surely, 2^12377977538 is an apocalyptic number.

12377977538 is a deficient number, since it is larger than the sum of its proper divisors (8177411902).

12377977538 is a wasteful number, since it uses less digits than its factorization.

12377977538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198362.

The product of its digits is 15558480, while the sum is 59.

The spelling of 12377977538 in words is "twelve billion, three hundred seventy-seven million, nine hundred seventy-seven thousand, five hundred thirty-eight".