79781394293 has 8 divisors (see below), whose sum is σ = 81997130880. Its totient is φ = 77595804000.

The previous prime is 79781394197. The next prime is 79781394299. The reversal of 79781394293 is 39249318797.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79781394293 - 2¹⁸ = 79781132149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79781394299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7531208 + ... + 7541793.

It is an arithmetic number, because the mean of its divisors is an integer number (10249641360).

Almost surely, 2^79781394293 is an apocalyptic number.

It is an amenable number.

79781394293 is a deficient number, since it is larger than the sum of its proper divisors (2215736587).

79781394293 is a wasteful number, since it uses less digits than its factorization.

79781394293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15073147.

The product of its digits is 20575296, while the sum is 62.

The spelling of 79781394293 in words is "seventy-nine billion, seven hundred eighty-one million, three hundred ninety-four thousand, two hundred ninety-three".