77121074037231 has 40 divisors (see below), whose sum is σ = 131664262911104. Its totient is φ = 44068926957840.

The previous prime is 77121074037223. The next prime is 77121074037323. The reversal of 77121074037231 is 13273047012177.

77121074037231 is a `hidden beast` number, since 7 + 7 + 1 + 2 + 1 + 0 + 7 + 403 + 7 + 231 = 666.

It is not a de Polignac number, because 77121074037231 - 2³ = 77121074037223 is a prime.

It is a super-2 number, since 2×77121074037231² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77121074037211) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 140116236 + ... + 140665566.

Almost surely, 2^{77121074037231} is an apocalyptic number.

77121074037231 is a deficient number, since it is larger than the sum of its proper divisors (54543188873873).

77121074037231 is a wasteful number, since it uses less digits than its factorization.

77121074037231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796953 (or 796944 counting only the distinct ones).

The product of its (nonzero) digits is 345744, while the sum is 45.

The spelling of 77121074037231 in words is "seventy-seven trillion, one hundred twenty-one billion, seventy-four million, thirty-seven thousand, two hundred thirty-one".