13156200040405 has 16 divisors (see below), whose sum is σ = 16214337508464. Its totient is φ = 10240369090560.

The previous prime is 13156200040397. The next prime is 13156200040409. The reversal of 13156200040405 is 50404000265131.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 63215033476 + 13092985006929 = 251426^2 + 3618423^2 .

It is not a de Polignac number, because 13156200040405 - 2³ = 13156200040397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13156200040409) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15329659 + ... + 16165111.

It is an arithmetic number, because the mean of its divisors is an integer number (1013396094279).

Almost surely, 2^{13156200040405} is an apocalyptic number.

It is an amenable number.

13156200040405 is a deficient number, since it is larger than the sum of its proper divisors (3058137468059).

13156200040405 is an equidigital number, since it uses as much as digits as its factorization.

13156200040405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 920616.

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 13156200040405 in words is "thirteen trillion, one hundred fifty-six billion, two hundred million, forty thousand, four hundred five".