161492563 has 16 divisors (see below), whose sum is σ = 170755200. Its totient is φ = 152550720.

The previous prime is 161492543. The next prime is 161492581. The reversal of 161492563 is 365294161.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161492563 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161492543) 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, 244728 + ... + 245386.

It is an arithmetic number, because the mean of its divisors is an integer number (10672200).

Almost surely, 2^161492563 is an apocalyptic number.

161492563 is a deficient number, since it is larger than the sum of its proper divisors (9262637).

161492563 is a wasteful number, since it uses less digits than its factorization.

161492563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 882.

The product of its digits is 38880, while the sum is 37.

The square root of 161492563 is about 12707.9724189188. The cubic root of 161492563 is about 544.5664009069.

The spelling of 161492563 in words is "one hundred sixty-one million, four hundred ninety-two thousand, five hundred sixty-three".