77544987113 has 4 divisors (see below), whose sum is σ = 84594531408. Its totient is φ = 70495442820.

The previous prime is 77544987103. The next prime is 77544987151. The reversal of 77544987113 is 31178944577.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 77544987113 - 2²⁶ = 77477878249 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77544987103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3524772131 + ... + 3524772152.

It is an arithmetic number, because the mean of its divisors is an integer number (21148632852).

Almost surely, 2^77544987113 is an apocalyptic number.

It is an amenable number.

77544987113 is a deficient number, since it is larger than the sum of its proper divisors (7049544295).

77544987113 is a wasteful number, since it uses less digits than its factorization.

77544987113 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7049544294.

The product of its digits is 5927040, while the sum is 56.

The spelling of 77544987113 in words is "seventy-seven billion, five hundred forty-four million, nine hundred eighty-seven thousand, one hundred thirteen".