161153507 has 4 divisors (see below), whose sum is σ = 161526120. Its totient is φ = 160780896.

The previous prime is 161153471. The next prime is 161153519. The reversal of 161153507 is 705351161.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 161153507 - 2¹⁰ = 161152483 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161153507.

It is not an unprimeable number, because it can be changed into a prime (161153527) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 185657 + ... + 186522.

It is an arithmetic number, because the mean of its divisors is an integer number (40381530).

Almost surely, 2^161153507 is an apocalyptic number.

161153507 is a deficient number, since it is larger than the sum of its proper divisors (372613).

161153507 is an equidigital number, since it uses as much as digits as its factorization.

161153507 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372612.

The product of its (nonzero) digits is 3150, while the sum is 29.

The square root of 161153507 is about 12694.6251224682. The cubic root of 161153507 is about 544.1850255045.

The spelling of 161153507 in words is "one hundred sixty-one million, one hundred fifty-three thousand, five hundred seven".