165306793481 has 4 divisors (see below), whose sum is σ = 168108603600. Its totient is φ = 162504983364.

The previous prime is 165306793471. The next prime is 165306793499. The reversal of 165306793481 is 184397603561.

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 165306793481 - 2²² = 165302599177 is a prime.

It is a super-2 number, since 2×165306793481² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165306793471) 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, 1400904971 + ... + 1400905088.

It is an arithmetic number, because the mean of its divisors is an integer number (42027150900).

Almost surely, 2^165306793481 is an apocalyptic number.

It is an amenable number.

165306793481 is a deficient number, since it is larger than the sum of its proper divisors (2801810119).

165306793481 is an equidigital number, since it uses as much as digits as its factorization.

165306793481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2801810118.

The product of its (nonzero) digits is 3265920, while the sum is 53.

The spelling of 165306793481 in words is "one hundred sixty-five billion, three hundred six million, seven hundred ninety-three thousand, four hundred eighty-one".