161350491 has 8 divisors (see below), whose sum is σ = 220137280. Its totient is φ = 105065352.

The previous prime is 161350487. The next prime is 161350493. The reversal of 161350491 is 194053161.

161350491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 161350491 - 2² = 161350487 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161350493) 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, 625261 + ... + 625518.

It is an arithmetic number, because the mean of its divisors is an integer number (27517160).

Almost surely, 2^161350491 is an apocalyptic number.

161350491 is a deficient number, since it is larger than the sum of its proper divisors (58786789).

161350491 is a wasteful number, since it uses less digits than its factorization.

161350491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250825.

The product of its (nonzero) digits is 3240, while the sum is 30.

The square root of 161350491 is about 12702.3813121792. The cubic root of 161350491 is about 544.4066611739.

The spelling of 161350491 in words is "one hundred sixty-one million, three hundred fifty thousand, four hundred ninety-one".