78826053769 has 2 divisors, whose sum is σ = 78826053770. Its totient is φ = 78826053768.

The previous prime is 78826053743. The next prime is 78826053793. The reversal of 78826053769 is 96735062887.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68650288144 + 10175765625 = 262012^2 + 100875^2 .

It is an emirp because it is prime and its reverse (96735062887) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78826053769 - 2⁷ = 78826053641 is a prime.

It is a super-2 number, since 2×78826053769² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (78826059769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39413026884 + 39413026885.

It is an arithmetic number, because the mean of its divisors is an integer number (39413026885).

Almost surely, 2^78826053769 is an apocalyptic number.

It is an amenable number.

78826053769 is a deficient number, since it is larger than the sum of its proper divisors (1).

78826053769 is an equidigital number, since it uses as much as digits as its factorization.

78826053769 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 78826053769 in words is "seventy-eight billion, eight hundred twenty-six million, fifty-three thousand, seven hundred sixty-nine".