77234456131547 has 24 divisors (see below), whose sum is σ = 91708261703568. Its totient is φ = 64476316569600.

The previous prime is 77234456131543. The next prime is 77234456131601. The reversal of 77234456131547 is 74513165443277.

It is not a de Polignac number, because 77234456131547 - 2² = 77234456131543 is a prime.

It is a super-2 number, since 2×77234456131547² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77234456131541) 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, 107273954 + ... + 107991527.

It is an arithmetic number, because the mean of its divisors is an integer number (3821177570982).

Almost surely, 2^{77234456131547} is an apocalyptic number.

77234456131547 is a deficient number, since it is larger than the sum of its proper divisors (14473805572021).

77234456131547 is a wasteful number, since it uses less digits than its factorization.

77234456131547 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215265711 (or 215265698 counting only the distinct ones).

The product of its digits is 59270400, while the sum is 59.

The spelling of 77234456131547 in words is "seventy-seven trillion, two hundred thirty-four billion, four hundred fifty-six million, one hundred thirty-one thousand, five hundred forty-seven".