77857186233149 has 16 divisors (see below), whose sum is σ = 79385169412224. Its totient is φ = 76331396356800.

The previous prime is 77857186233137. The next prime is 77857186233187. The reversal of 77857186233149 is 94133268175877.

It is not a de Polignac number, because 77857186233149 - 2²⁸ = 77856917797693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77857186133149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1112353544 + ... + 1112423534.

It is an arithmetic number, because the mean of its divisors is an integer number (4961573088264).

Almost surely, 2^{77857186233149} is an apocalyptic number.

It is an amenable number.

77857186233149 is a deficient number, since it is larger than the sum of its proper divisors (1527983179075).

77857186233149 is a wasteful number, since it uses less digits than its factorization.

77857186233149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85348.

The product of its digits is 426746880, while the sum is 71.

The spelling of 77857186233149 in words is "seventy-seven trillion, eight hundred fifty-seven billion, one hundred eighty-six million, two hundred thirty-three thousand, one hundred forty-nine".