162408931621 has 4 divisors (see below), whose sum is σ = 162498022272. Its totient is φ = 162319840972.

The previous prime is 162408931613. The next prime is 162408931637. The reversal of 162408931621 is 126139804261.

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, and also an emirpimes, since its reverse is a distinct semiprime: 126139804261 = 389 ⋅324266849.

It is a cyclic number.

It is not a de Polignac number, because 162408931621 - 2³ = 162408931613 is a prime.

It is a super-2 number, since 2×162408931621² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162408931921) 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, 44542591 + ... + 44546236.

It is an arithmetic number, because the mean of its divisors is an integer number (40624505568).

Almost surely, 2^162408931621 is an apocalyptic number.

It is an amenable number.

162408931621 is a deficient number, since it is larger than the sum of its proper divisors (89090651).

162408931621 is an equidigital number, since it uses as much as digits as its factorization.

162408931621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89090650.

The product of its (nonzero) digits is 124416, while the sum is 43.

The spelling of 162408931621 in words is "one hundred sixty-two billion, four hundred eight million, nine hundred thirty-one thousand, six hundred twenty-one".