161878153 has 8 divisors (see below), whose sum is σ = 162989568. Its totient is φ = 160770624.

The previous prime is 161878139. The next prime is 161878169. The reversal of 161878153 is 351878161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 161878153 - 2⁵ = 161878121 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161878103) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 165201 + ... + 166177.

It is an arithmetic number, because the mean of its divisors is an integer number (20373696).

Almost surely, 2^161878153 is an apocalyptic number.

It is an amenable number.

161878153 is a deficient number, since it is larger than the sum of its proper divisors (1111415).

161878153 is an equidigital number, since it uses as much as digits as its factorization.

161878153 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1943.

The product of its digits is 40320, while the sum is 40.

The square root of 161878153 is about 12723.1345587477. The cubic root of 161878153 is about 544.9994703022. Note that the first 3 decimals are identical.

The spelling of 161878153 in words is "one hundred sixty-one million, eight hundred seventy-eight thousand, one hundred fifty-three".