161468538 has 32 divisors (see below), whose sum is σ = 402624000. Its totient is φ = 41939760.

The previous prime is 161468521. The next prime is 161468539. The reversal of 161468538 is 835864161.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 161468538.

It is not an unprimeable number, because it can be changed into a prime (161468539) 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, 174288 + ... + 175211.

It is an arithmetic number, because the mean of its divisors is an integer number (12582000).

Almost surely, 2^161468538 is an apocalyptic number.

161468538 is an abundant number, since it is smaller than the sum of its proper divisors (241155462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

161468538 is a wasteful number, since it uses less digits than its factorization.

161468538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 349522.

The product of its digits is 138240, while the sum is 42.

The square root of 161468538 is about 12707.0271110122. The cubic root of 161468538 is about 544.5393947993.

The spelling of 161468538 in words is "one hundred sixty-one million, four hundred sixty-eight thousand, five hundred thirty-eight".