165700115701557 has 4 divisors (see below), whose sum is σ = 220933487602080. Its totient is φ = 110466743801036.

The previous prime is 165700115701493. The next prime is 165700115701559. The reversal of 165700115701557 is 755107511007561.

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 165700115701557 - 2⁶ = 165700115701493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165700115701559) 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, 27616685950257 + ... + 27616685950262.

It is an arithmetic number, because the mean of its divisors is an integer number (55233371900520).

Almost surely, 2^{165700115701557} is an apocalyptic number.

It is an amenable number.

165700115701557 is a deficient number, since it is larger than the sum of its proper divisors (55233371900523).

165700115701557 is an equidigital number, since it uses as much as digits as its factorization.

165700115701557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55233371900522.

The product of its (nonzero) digits is 1286250, while the sum is 51.

The spelling of 165700115701557 in words is "one hundred sixty-five trillion, seven hundred billion, one hundred fifteen million, seven hundred one thousand, five hundred fifty-seven".