79926209641 has 4 divisors (see below), whose sum is σ = 79988217300. Its totient is φ = 79864201984.

The previous prime is 79926209579. The next prime is 79926209651. The reversal of 79926209641 is 14690262997.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 14690262997 = 29 ⋅506560793.

It can be written as a sum of positive squares in 2 ways, for example, as 54100434025 + 25825775616 = 232595^2 + 160704^2 .

It is a cyclic number.

It is not a de Polignac number, because 79926209641 - 2¹¹ = 79926207593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79926209651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31001896 + ... + 31004473.

It is an arithmetic number, because the mean of its divisors is an integer number (19997054325).

Almost surely, 2^79926209641 is an apocalyptic number.

It is an amenable number.

79926209641 is a deficient number, since it is larger than the sum of its proper divisors (62007659).

79926209641 is a wasteful number, since it uses less digits than its factorization.

79926209641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62007658.

The product of its (nonzero) digits is 2939328, while the sum is 55.

The spelling of 79926209641 in words is "seventy-nine billion, nine hundred twenty-six million, two hundred nine thousand, six hundred forty-one".