79788545293 has 2 divisors, whose sum is σ = 79788545294. Its totient is φ = 79788545292.

The previous prime is 79788545233. The next prime is 79788545311. The reversal of 79788545293 is 39254588797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50684867689 + 29103677604 = 225133^2 + 170598^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-79788545293 is a prime.

It is a super-2 number, since 2×79788545293² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79788545233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39894272646 + 39894272647.

It is an arithmetic number, because the mean of its divisors is an integer number (39894272647).

Almost surely, 2^79788545293 is an apocalyptic number.

It is an amenable number.

79788545293 is a deficient number, since it is larger than the sum of its proper divisors (1).

79788545293 is an equidigital number, since it uses as much as digits as its factorization.

79788545293 is an evil number, because the sum of its binary digits is even.

The product of its digits is 152409600, while the sum is 67.

The spelling of 79788545293 in words is "seventy-nine billion, seven hundred eighty-eight million, five hundred forty-five thousand, two hundred ninety-three".