161136642 has 64 divisors (see below), whose sum is σ = 356638464. Its totient is φ = 48322560.

The previous prime is 161136641. The next prime is 161136707. The reversal of 161136642 is 246631161.

It is not an unprimeable number, because it can be changed into a prime (161136641) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 221283 + ... + 222009.

It is an arithmetic number, because the mean of its divisors is an integer number (5572476).

Almost surely, 2^161136642 is an apocalyptic number.

161136642 is an abundant number, since it is smaller than the sum of its proper divisors (195501822).

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

161136642 is a wasteful number, since it uses less digits than its factorization.

161136642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 843.

The product of its digits is 5184, while the sum is 30.

The square root of 161136642 is about 12693.9608475842. The cubic root of 161136642 is about 544.1660415332.

The spelling of 161136642 in words is "one hundred sixty-one million, one hundred thirty-six thousand, six hundred forty-two".