77747139294 has 16 divisors (see below), whose sum is σ = 169630122240. Its totient is φ = 23559739160.

The previous prime is 77747139293. The next prime is 77747139311. The reversal of 77747139294 is 49293174777.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77747139293) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 588993414 + ... + 588993545.

It is an arithmetic number, because the mean of its divisors is an integer number (10601882640).

Almost surely, 2^77747139294 is an apocalyptic number.

77747139294 is an abundant number, since it is smaller than the sum of its proper divisors (91882982946).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

77747139294 is a wasteful number, since it uses less digits than its factorization.

77747139294 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1177986975.

The product of its digits is 18670176, while the sum is 60.

The spelling of 77747139294 in words is "seventy-seven billion, seven hundred forty-seven million, one hundred thirty-nine thousand, two hundred ninety-four".