13405435253173 has 2 divisors, whose sum is σ = 13405435253174. Its totient is φ = 13405435253172.

The previous prime is 13405435253149. The next prime is 13405435253269. The reversal of 13405435253173 is 37135253450431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 7300468955844 + 6104966297329 = 2701938^2 + 2470823^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13405435253173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (13405435253143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6702717626586 + 6702717626587.

It is an arithmetic number, because the mean of its divisors is an integer number (6702717626587).

Almost surely, 2^{13405435253173} is an apocalyptic number.

It is an amenable number.

13405435253173 is a deficient number, since it is larger than the sum of its proper divisors (1).

13405435253173 is an equidigital number, since it uses as much as digits as its factorization.

13405435253173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2268000, while the sum is 46.

The spelling of 13405435253173 in words is "thirteen trillion, four hundred five billion, four hundred thirty-five million, two hundred fifty-three thousand, one hundred seventy-three".