77859231157 has 16 divisors (see below), whose sum is σ = 78855884800. Its totient is φ = 76868326080.

The previous prime is 77859231143. The next prime is 77859231167. The reversal of 77859231157 is 75113295877.

It is a cyclic number.

It is not a de Polignac number, because 77859231157 - 2²³ = 77850842549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77859231098 and 77859231107.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77859231137) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60874444 + ... + 60875722.

It is an arithmetic number, because the mean of its divisors is an integer number (4928492800).

Almost surely, 2^77859231157 is an apocalyptic number.

It is an amenable number.

77859231157 is a deficient number, since it is larger than the sum of its proper divisors (996653643).

77859231157 is a wasteful number, since it uses less digits than its factorization.

77859231157 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2956.

The product of its digits is 3704400, while the sum is 55.

The spelling of 77859231157 in words is "seventy-seven billion, eight hundred fifty-nine million, two hundred thirty-one thousand, one hundred fifty-seven".