79778286451 has 2 divisors, whose sum is σ = 79778286452. Its totient is φ = 79778286450.

The previous prime is 79778286391. The next prime is 79778286479. The reversal of 79778286451 is 15468287797.

It is a strong prime.

It is an emirp because it is prime and its reverse (15468287797) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79778286451 - 2²⁵ = 79744732019 is a prime.

It is not a weakly prime, because it can be changed into another prime (79778286481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39889143225 + 39889143226.

It is an arithmetic number, because the mean of its divisors is an integer number (39889143226).

Almost surely, 2^79778286451 is an apocalyptic number.

79778286451 is a deficient number, since it is larger than the sum of its proper divisors (1).

79778286451 is an equidigital number, since it uses as much as digits as its factorization.

79778286451 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47416320, while the sum is 64.

The spelling of 79778286451 in words is "seventy-nine billion, seven hundred seventy-eight million, two hundred eighty-six thousand, four hundred fifty-one".