77857488188613 has 72 divisors (see below), whose sum is σ = 136536415171520. Its totient is φ = 41871509314560.

The previous prime is 77857488188533. The next prime is 77857488188633. The reversal of 77857488188613 is 31688188475877.

77857488188613 is a `hidden beast` number, since 7 + 7 + 8 + 57 + 488 + 1 + 8 + 86 + 1 + 3 = 666.

It is not a de Polignac number, because 77857488188613 - 2¹⁷ = 77857488057541 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77857488188633) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 743139153 + ... + 743243913.

Almost surely, 2^{77857488188613} is an apocalyptic number.

It is an amenable number.

77857488188613 is a deficient number, since it is larger than the sum of its proper divisors (58678926982907).

77857488188613 is a wasteful number, since it uses less digits than its factorization.

77857488188613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145627 (or 145607 counting only the distinct ones).

The product of its digits is 4046192640, while the sum is 81.

The spelling of 77857488188613 in words is "seventy-seven trillion, eight hundred fifty-seven billion, four hundred eighty-eight million, one hundred eighty-eight thousand, six hundred thirteen".