79401659089 has 3 divisors (see below), whose sum is σ = 79401940873. Its totient is φ = 79401377306.

The previous prime is 79401659069. The next prime is 79401659101. The reversal of 79401659089 is 98095610497.

The square root of 79401659089 is 281783.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 98095610497 = 4421 ⋅22188557.

It is not a de Polignac number, because 79401659089 - 2¹⁹ = 79401134801 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79401659039) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 140892 + ... + 422674.

Almost surely, 2^79401659089 is an apocalyptic number.

79401659089 is the 281783-rd square number.

79401659089 is the 140892-nd centered octagonal number.

It is an amenable number.

79401659089 is a deficient number, since it is larger than the sum of its proper divisors (281784).

79401659089 is an frugal number, since it uses more digits than its factorization.

79401659089 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 563566 (or 281783 counting only the distinct ones).

The product of its (nonzero) digits is 4898880, while the sum is 58.

The spelling of 79401659089 in words is "seventy-nine billion, four hundred one million, six hundred fifty-nine thousand, eighty-nine".