161603454 has 8 divisors (see below), whose sum is σ = 323206920. Its totient is φ = 53867816.

The previous prime is 161603443. The next prime is 161603461. The reversal of 161603454 is 454306161.

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

161603454 is an admirable number.

It is a super-2 number, since 2×161603454² = 52231352689460232, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13466949 + ... + 13466960.

It is an arithmetic number, because the mean of its divisors is an integer number (40400865).

Almost surely, 2^161603454 is an apocalyptic number.

161603454 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

161603454 is a wasteful number, since it uses less digits than its factorization.

161603454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26933914.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 161603454 is about 12712.3347186896. The cubic root of 161603454 is about 544.6910169573.

The spelling of 161603454 in words is "one hundred sixty-one million, six hundred three thousand, four hundred fifty-four".