813740729599639 has 2 divisors, whose sum is σ = 813740729599640. Its totient is φ = 813740729599638.

The previous prime is 813740729599613. The next prime is 813740729599649. The reversal of 813740729599639 is 936995927047318.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 813740729599639 - 2⁵ = 813740729599607 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (813740729599649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 406870364799819 + 406870364799820.

It is an arithmetic number, because the mean of its divisors is an integer number (406870364799820).

It is a 1-persistent number, because it is pandigital, but 2⋅813740729599639 = 1627481459199278 is not.

Almost surely, 2^{813740729599639} is an apocalyptic number.

813740729599639 is a deficient number, since it is larger than the sum of its proper divisors (1).

813740729599639 is an equidigital number, since it uses as much as digits as its factorization.

813740729599639 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5555329920, while the sum is 82.

The spelling of 813740729599639 in words is "eight hundred thirteen trillion, seven hundred forty billion, seven hundred twenty-nine million, five hundred ninety-nine thousand, six hundred thirty-nine".