165457363577 has 4 divisors (see below), whose sum is σ = 180498942096. Its totient is φ = 150415785060.

The previous prime is 165457363537. The next prime is 165457363639. The reversal of 165457363577 is 775363754561.

It is a happy number.

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 165457363577 - 2²⁶ = 165390254713 is a prime.

It is a super-2 number, since 2×165457363577² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (165457363507) 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, 7520789243 + ... + 7520789264.

It is an arithmetic number, because the mean of its divisors is an integer number (45124735524).

Almost surely, 2^165457363577 is an apocalyptic number.

It is an amenable number.

165457363577 is a deficient number, since it is larger than the sum of its proper divisors (15041578519).

165457363577 is a wasteful number, since it uses less digits than its factorization.

165457363577 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15041578518.

The product of its digits is 55566000, while the sum is 59.

The spelling of 165457363577 in words is "one hundred sixty-five billion, four hundred fifty-seven million, three hundred sixty-three thousand, five hundred seventy-seven".