79898945381641 has 9 divisors (see below), whose sum is σ = 79955916042061. Its totient is φ = 79842015304492.

The previous prime is 79898945381639. The next prime is 79898945381669. The reversal of 79898945381641 is 14618354989897.

The square root of 79898945381641 is 8938621.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 79898945381641 - 2¹ = 79898945381639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79898945381041) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 18654899886 + ... + 18654904168.

Almost surely, 2^{79898945381641} is an apocalyptic number.

79898945381641 is the 8938621-st square number.

79898945381641 is the 4469311-st centered octagonal number.

It is an amenable number.

79898945381641 is a deficient number, since it is larger than the sum of its proper divisors (56970660420).

79898945381641 is an frugal number, since it uses more digits than its factorization.

79898945381641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12740 (or 6370 counting only the distinct ones).

The product of its digits is 3762339840, while the sum is 82.

The spelling of 79898945381641 in words is "seventy-nine trillion, eight hundred ninety-eight billion, nine hundred forty-five million, three hundred eighty-one thousand, six hundred forty-one".