162104421621 has 48 divisors (see below), whose sum is σ = 242244463104. Its totient is φ = 96029568000.

The previous prime is 162104421607. The next prime is 162104421637. The reversal of 162104421621 is 126124401261.

It is a de Polignac number, because none of the positive numbers 2^k-162104421621 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (162104421601) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1969116 + ... + 2049786.

It is an arithmetic number, because the mean of its divisors is an integer number (5046759648).

Almost surely, 2^162104421621 is an apocalyptic number.

It is an amenable number.

162104421621 is a deficient number, since it is larger than the sum of its proper divisors (80140041483).

162104421621 is a wasteful number, since it uses less digits than its factorization.

162104421621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80794 (or 80763 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

Adding to 162104421621 its reverse (126124401261), we get a palindrome (288228822882).

The spelling of 162104421621 in words is "one hundred sixty-two billion, one hundred four million, four hundred twenty-one thousand, six hundred twenty-one".