79877788777807 has 2 divisors, whose sum is σ = 79877788777808. Its totient is φ = 79877788777806.

The previous prime is 79877788777753. The next prime is 79877788777859. The reversal of 79877788777807 is 70877788777897.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 79877788777807 - 2³⁹ = 79328032963919 is a prime.

It is a super-2 number, since 2×79877788777807² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79877788777877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39938894388903 + 39938894388904.

It is an arithmetic number, because the mean of its divisors is an integer number (39938894388904).

Almost surely, 2^{79877788777807} is an apocalyptic number.

79877788777807 is a deficient number, since it is larger than the sum of its proper divisors (1).

79877788777807 is an equidigital number, since it uses as much as digits as its factorization.

79877788777807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 212513624064, while the sum is 97.

The spelling of 79877788777807 in words is "seventy-nine trillion, eight hundred seventy-seven billion, seven hundred eighty-eight million, seven hundred seventy-seven thousand, eight hundred seven".