77136543 has 20 divisors (see below), whose sum is σ = 125705448. Its totient is φ = 46748880.

The previous prime is 77136529. The next prime is 77136551. The reversal of 77136543 is 34563177.

It is not a de Polignac number, because 77136543 - 2⁵ = 77136511 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 77136498 and 77136507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77136443) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 42396 + ... + 44177.

Almost surely, 2^77136543 is an apocalyptic number.

77136543 is a deficient number, since it is larger than the sum of its proper divisors (48568905).

77136543 is a wasteful number, since it uses less digits than its factorization.

77136543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86596 (or 86587 counting only the distinct ones).

The product of its digits is 52920, while the sum is 36.

The square root of 77136543 is about 8782.7412007869. The cubic root of 77136543 is about 425.6834088950.

The spelling of 77136543 in words is "seventy-seven million, one hundred thirty-six thousand, five hundred forty-three".