8157131682 has 16 divisors (see below), whose sum is σ = 18644872512. Its totient is φ = 2330609040.

The previous prime is 8157131657. The next prime is 8157131693. The reversal of 8157131682 is 2861317518.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 194217421 = 8157131682 / (8 + 1 + 5 + 7 + 1 + 3 + 1 + 6 + 8 + 2).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97108669 + ... + 97108752.

It is an arithmetic number, because the mean of its divisors is an integer number (1165304532).

Almost surely, 2^8157131682 is an apocalyptic number.

8157131682 is an abundant number, since it is smaller than the sum of its proper divisors (10487740830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8157131682 is a wasteful number, since it uses less digits than its factorization.

8157131682 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194217433.

The product of its digits is 80640, while the sum is 42.

The square root of 8157131682 is about 90316.8405226844. The cubic root of 8157131682 is about 2013.0094998057.

The spelling of 8157131682 in words is "eight billion, one hundred fifty-seven million, one hundred thirty-one thousand, six hundred eighty-two".