161364135443 has 16 divisors (see below), whose sum is σ = 185694428160. Its totient is φ = 137355480000.

The previous prime is 161364135433. The next prime is 161364135521. The reversal of 161364135443 is 344531463161.

It is a cyclic number.

It is not a de Polignac number, because 161364135443 - 2¹² = 161364131347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161364135443.

It is not an unprimeable number, because it can be changed into a prime (161364135403) 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, 855263 + ... + 1026743.

It is an arithmetic number, because the mean of its divisors is an integer number (11605901760).

Almost surely, 2^161364135443 is an apocalyptic number.

161364135443 is a deficient number, since it is larger than the sum of its proper divisors (24330292717).

161364135443 is a wasteful number, since it uses less digits than its factorization.

161364135443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172418.

The product of its digits is 311040, while the sum is 41.

The spelling of 161364135443 in words is "one hundred sixty-one billion, three hundred sixty-four million, one hundred thirty-five thousand, four hundred forty-three".