79988805847 has 2 divisors, whose sum is σ = 79988805848. Its totient is φ = 79988805846.

The previous prime is 79988805811. The next prime is 79988805851. The reversal of 79988805847 is 74850888997.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79988805847 - 2¹⁹ = 79988281559 is a prime.

It is a super-2 number, since 2×79988805847² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 79988805847.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79988805047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39994402923 + 39994402924.

It is an arithmetic number, because the mean of its divisors is an integer number (39994402924).

Almost surely, 2^79988805847 is an apocalyptic number.

79988805847 is a deficient number, since it is larger than the sum of its proper divisors (1).

79988805847 is an equidigital number, since it uses as much as digits as its factorization.

79988805847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 325140480, while the sum is 73.

The spelling of 79988805847 in words is "seventy-nine billion, nine hundred eighty-eight million, eight hundred five thousand, eight hundred forty-seven".