13520557401839 has 2 divisors, whose sum is σ = 13520557401840. Its totient is φ = 13520557401838.

The previous prime is 13520557401829. The next prime is 13520557401887. The reversal of 13520557401839 is 93810475502531.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13520557401839 - 2⁴⁰ = 12421045774063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13520557401829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6760278700919 + 6760278700920.

It is an arithmetic number, because the mean of its divisors is an integer number (6760278700920).

Almost surely, 2^{13520557401839} is an apocalyptic number.

13520557401839 is a deficient number, since it is larger than the sum of its proper divisors (1).

13520557401839 is an equidigital number, since it uses as much as digits as its factorization.

13520557401839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536000, while the sum is 53.

The spelling of 13520557401839 in words is "thirteen trillion, five hundred twenty billion, five hundred fifty-seven million, four hundred one thousand, eight hundred thirty-nine".