157686072713 has 8 divisors (see below), whose sum is σ = 174405386568. Its totient is φ = 141622418304.

The previous prime is 157686072701. The next prime is 157686072721. The reversal of 157686072713 is 317270686751.

It can be written as a sum of positive squares in 4 ways, for example, as 7941839689 + 149744233024 = 89117^2 + 386968^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 157686072713 - 2¹⁴ = 157686056329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157686072793) 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 7 ways as a sum of consecutive naturals, for example, 163914356 + ... + 163915317.

It is an arithmetic number, because the mean of its divisors is an integer number (21800673321).

Almost surely, 2^157686072713 is an apocalyptic number.

157686072713 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

157686072713 is a deficient number, since it is larger than the sum of its proper divisors (16719313855).

157686072713 is a wasteful number, since it uses less digits than its factorization.

157686072713 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327829723.

The product of its (nonzero) digits is 2963520, while the sum is 53.

The spelling of 157686072713 in words is "one hundred fifty-seven billion, six hundred eighty-six million, seventy-two thousand, seven hundred thirteen".