161358265013 has 16 divisors (see below), whose sum is σ = 185931220992. Its totient is φ = 138656070000.

The previous prime is 161358265007. The next prime is 161358265021. The reversal of 161358265013 is 310562853161.

It is a cyclic number.

It is not a de Polignac number, because 161358265013 - 2²⁸ = 161089829557 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161358265513) 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, 5487563 + ... + 5516888.

It is an arithmetic number, because the mean of its divisors is an integer number (11620701312).

Almost surely, 2^161358265013 is an apocalyptic number.

It is an amenable number.

161358265013 is a deficient number, since it is larger than the sum of its proper divisors (24572955979).

161358265013 is a wasteful number, since it uses less digits than its factorization.

161358265013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11004536.

The product of its (nonzero) digits is 129600, while the sum is 41.

The spelling of 161358265013 in words is "one hundred sixty-one billion, three hundred fifty-eight million, two hundred sixty-five thousand, thirteen".