161153506 has 16 divisors (see below), whose sum is σ = 261398016. Its totient is φ = 74222656.

The previous prime is 161153471. The next prime is 161153519. The reversal of 161153506 is 605351161.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48826 + ... + 52021.

It is an arithmetic number, because the mean of its divisors is an integer number (16337376).

Almost surely, 2^161153506 is an apocalyptic number.

161153506 is a deficient number, since it is larger than the sum of its proper divisors (100244510).

161153506 is a wasteful number, since it uses less digits than its factorization.

161153506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100913.

The product of its (nonzero) digits is 2700, while the sum is 28.

The square root of 161153506 is about 12694.6250830814. The cubic root of 161153506 is about 544.1850243789.

The spelling of 161153506 in words is "one hundred sixty-one million, one hundred fifty-three thousand, five hundred six".