79780331563 has 2 divisors, whose sum is σ = 79780331564. Its totient is φ = 79780331562.

The previous prime is 79780331537. The next prime is 79780331569. The reversal of 79780331563 is 36513308797.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79780331563 - 2²⁹ = 79243460651 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 79780331563.

It is not a weakly prime, because it can be changed into another prime (79780331569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39890165781 + 39890165782.

It is an arithmetic number, because the mean of its divisors is an integer number (39890165782).

Almost surely, 2^79780331563 is an apocalyptic number.

79780331563 is a deficient number, since it is larger than the sum of its proper divisors (1).

79780331563 is an equidigital number, since it uses as much as digits as its factorization.

79780331563 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2857680, while the sum is 52.

The spelling of 79780331563 in words is "seventy-nine billion, seven hundred eighty million, three hundred thirty-one thousand, five hundred sixty-three".