77039677838 has 12 divisors (see below), whose sum is σ = 119407495320. Its totient is φ = 37277262540.

The previous prime is 77039677837. The next prime is 77039677867. The reversal of 77039677838 is 83877693077.

It is a super-2 number, since 2×77039677838² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77039677837) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 20039618 + ... + 20043461.

It is an arithmetic number, because the mean of its divisors is an integer number (9950624610).

Almost surely, 2^77039677838 is an apocalyptic number.

77039677838 is a deficient number, since it is larger than the sum of its proper divisors (42367817482).

77039677838 is a wasteful number, since it uses less digits than its factorization.

77039677838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40083143 (or 40083112 counting only the distinct ones).

The product of its (nonzero) digits is 74680704, while the sum is 65.

The spelling of 77039677838 in words is "seventy-seven billion, thirty-nine million, six hundred seventy-seven thousand, eight hundred thirty-eight".