162747889621 has 2 divisors, whose sum is σ = 162747889622. Its totient is φ = 162747889620.

The previous prime is 162747889567. The next prime is 162747889631. The reversal of 162747889621 is 126988747261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 149062399396 + 13685490225 = 386086^2 + 116985^2 .

It is an emirp because it is prime and its reverse (126988747261) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 162747889621 - 2³⁵ = 128388151253 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 162747889621.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (162747889631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81373944810 + 81373944811.

It is an arithmetic number, because the mean of its divisors is an integer number (81373944811).

Almost surely, 2^162747889621 is an apocalyptic number.

It is an amenable number.

162747889621 is a deficient number, since it is larger than the sum of its proper divisors (1).

162747889621 is an equidigital number, since it uses as much as digits as its factorization.

162747889621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16257024, while the sum is 61.

The spelling of 162747889621 in words is "one hundred sixty-two billion, seven hundred forty-seven million, eight hundred eighty-nine thousand, six hundred twenty-one".