157571660517 has 4 divisors (see below), whose sum is σ = 210095547360. Its totient is φ = 105047773676.

The previous prime is 157571660509. The next prime is 157571660557. The reversal of 157571660517 is 715066175751.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 157571660517 - 2³ = 157571660509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 157571660517.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (157571660557) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26261943417 + ... + 26261943422.

It is an arithmetic number, because the mean of its divisors is an integer number (52523886840).

Almost surely, 2^157571660517 is an apocalyptic number.

It is an amenable number.

157571660517 is a deficient number, since it is larger than the sum of its proper divisors (52523886843).

157571660517 is an equidigital number, since it uses as much as digits as its factorization.

157571660517 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52523886842.

The product of its (nonzero) digits is 1543500, while the sum is 51.

The spelling of 157571660517 in words is "one hundred fifty-seven billion, five hundred seventy-one million, six hundred sixty thousand, five hundred seventeen".