165372727461 has 4 divisors (see below), whose sum is σ = 220496969952. Its totient is φ = 110248484972.

The previous prime is 165372727439. The next prime is 165372727511. The reversal of 165372727461 is 164727273561.

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 165372727461 - 2²¹ = 165370630309 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165372725461) 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 3 ways as a sum of consecutive naturals, for example, 27562121241 + ... + 27562121246.

It is an arithmetic number, because the mean of its divisors is an integer number (55124242488).

Almost surely, 2^165372727461 is an apocalyptic number.

It is an amenable number.

165372727461 is a deficient number, since it is larger than the sum of its proper divisors (55124242491).

165372727461 is an equidigital number, since it uses as much as digits as its factorization.

165372727461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55124242490.

The product of its digits is 2963520, while the sum is 51.

The spelling of 165372727461 in words is "one hundred sixty-five billion, three hundred seventy-two million, seven hundred twenty-seven thousand, four hundred sixty-one".