77538851 has 4 divisors (see below), whose sum is σ = 83503392. Its totient is φ = 71574312.

The previous prime is 77538833. The next prime is 77538863. The reversal of 77538851 is 15883577.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 77538851 - 2²⁶ = 10429987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77538821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2982251 + ... + 2982276.

It is an arithmetic number, because the mean of its divisors is an integer number (20875848).

Almost surely, 2^77538851 is an apocalyptic number.

77538851 is a deficient number, since it is larger than the sum of its proper divisors (5964541).

77538851 is a wasteful number, since it uses less digits than its factorization.

77538851 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5964540.

The product of its digits is 235200, while the sum is 44.

The square root of 77538851 is about 8805.6147428785. The cubic root of 77538851 is about 426.4221809645.

The spelling of 77538851 in words is "seventy-seven million, five hundred thirty-eight thousand, eight hundred fifty-one".