168120465551 has 4 divisors (see below), whose sum is σ = 170488359504. Its totient is φ = 165752571600.

The previous prime is 168120465529. The next prime is 168120465553. The reversal of 168120465551 is 155564021861.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 168120465551 - 2²² = 168116271247 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (168120465553) 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, 1183946870 + ... + 1183947011.

It is an arithmetic number, because the mean of its divisors is an integer number (42622089876).

Almost surely, 2^168120465551 is an apocalyptic number.

168120465551 is a deficient number, since it is larger than the sum of its proper divisors (2367893953).

168120465551 is an equidigital number, since it uses as much as digits as its factorization.

168120465551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2367893952.

The product of its (nonzero) digits is 288000, while the sum is 44.

The spelling of 168120465551 in words is "one hundred sixty-eight billion, one hundred twenty million, four hundred sixty-five thousand, five hundred fifty-one".