79232091340081 has 9 divisors (see below), whose sum is σ = 79300306795041. Its totient is φ = 79163934537744.

The previous prime is 79232091339991. The next prime is 79232091340099. The reversal of 79232091340081 is 18004319023297.

It is a happy number.

The square root of 79232091340081 is 8901241.

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

It can be written as a sum of positive squares in 4 ways, for example, as 19370922340081 + 59861169000000 = 4401241^2 + 7737000^2 .

It is not a de Polignac number, because 79232091340081 - 2¹⁹ = 79232090815793 is a prime.

It is a super-2 number, since 2×79232091340081² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79232091340981) 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, 12719870275 + ... + 12719876503.

It is an arithmetic number, because the mean of its divisors is an integer number (8811145199449).

Almost surely, 2^{79232091340081} is an apocalyptic number.

79232091340081 is the 8901241-st square number.

79232091340081 is the 4450621-st centered octagonal number.

It is an amenable number.

79232091340081 is a deficient number, since it is larger than the sum of its proper divisors (68215454960).

79232091340081 is an frugal number, since it uses more digits than its factorization.

79232091340081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15316 (or 7658 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 49.

The spelling of 79232091340081 in words is "seventy-nine trillion, two hundred thirty-two billion, ninety-one million, three hundred forty thousand, eighty-one".