115715671857 has 24 divisors (see below), whose sum is σ = 167533229448. Its totient is φ = 76964659200.

The previous prime is 115715671853. The next prime is 115715671889. The reversal of 115715671857 is 758176517511.

It is a happy number.

115715671857 is a `hidden beast` number, since 1 + 1 + 5 + 71 + 567 + 1 + 8 + 5 + 7 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14814784656 + 100900887201 = 121716^2 + 317649^2 .

It is not a de Polignac number, because 115715671857 - 2² = 115715671853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (115715671853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 21909057 + ... + 21914337.

It is an arithmetic number, because the mean of its divisors is an integer number (6980551227).

Almost surely, 2^115715671857 is an apocalyptic number.

It is an amenable number.

115715671857 is a deficient number, since it is larger than the sum of its proper divisors (51817557591).

115715671857 is a wasteful number, since it uses less digits than its factorization.

115715671857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10481 (or 10478 counting only the distinct ones).

The product of its digits is 2058000, while the sum is 54.

The spelling of 115715671857 in words is "one hundred fifteen billion, seven hundred fifteen million, six hundred seventy-one thousand, eight hundred fifty-seven".