77630137431 has 24 divisors (see below), whose sum is σ = 131351923584. Its totient is φ = 40327343280.

The previous prime is 77630137427. The next prime is 77630137457. The reversal of 77630137431 is 13473103677.

It is not a de Polignac number, because 77630137431 - 2² = 77630137427 is a prime.

It is a super-2 number, since 2×77630137431² (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 (77630137031) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 24002755 + ... + 24005988.

It is an arithmetic number, because the mean of its divisors is an integer number (5472996816).

Almost surely, 2^77630137431 is an apocalyptic number.

77630137431 is a deficient number, since it is larger than the sum of its proper divisors (53721786153).

77630137431 is a wasteful number, since it uses less digits than its factorization.

77630137431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48008771 (or 48008764 counting only the distinct ones).

The product of its (nonzero) digits is 222264, while the sum is 42.

The spelling of 77630137431 in words is "seventy-seven billion, six hundred thirty million, one hundred thirty-seven thousand, four hundred thirty-one".