13405215091 has 2 divisors, whose sum is σ = 13405215092. Its totient is φ = 13405215090.

The previous prime is 13405215073. The next prime is 13405215119. The reversal of 13405215091 is 19051250431.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13405215091 - 2¹¹ = 13405213043 is a prime.

It is not a weakly prime, because it can be changed into another prime (13405215191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6702607545 + 6702607546.

It is an arithmetic number, because the mean of its divisors is an integer number (6702607546).

Almost surely, 2^13405215091 is an apocalyptic number.

13405215091 is a deficient number, since it is larger than the sum of its proper divisors (1).

13405215091 is an equidigital number, since it uses as much as digits as its factorization.

13405215091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5400, while the sum is 31.

The spelling of 13405215091 in words is "thirteen billion, four hundred five million, two hundred fifteen thousand, ninety-one".