68036779453 has 2 divisors, whose sum is σ = 68036779454. Its totient is φ = 68036779452.

The previous prime is 68036779423. The next prime is 68036779457. The reversal of 68036779453 is 35497763086.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63409786969 + 4626992484 = 251813^2 + 68022^2 .

It is a cyclic number.

It is not a de Polignac number, because 68036779453 - 2²⁵ = 68003225021 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68036779457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34018389726 + 34018389727.

It is an arithmetic number, because the mean of its divisors is an integer number (34018389727).

Almost surely, 2^68036779453 is an apocalyptic number.

It is an amenable number.

68036779453 is a deficient number, since it is larger than the sum of its proper divisors (1).

68036779453 is an equidigital number, since it uses as much as digits as its factorization.

68036779453 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22861440, while the sum is 58.

The spelling of 68036779453 in words is "sixty-eight billion, thirty-six million, seven hundred seventy-nine thousand, four hundred fifty-three".