161103558 has 32 divisors (see below), whose sum is σ = 401713920. Its totient is φ = 41844960.

The previous prime is 161103557. The next prime is 161103583. The reversal of 161103558 is 855301161.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161103557) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 173893 + ... + 174816.

It is an arithmetic number, because the mean of its divisors is an integer number (12553560).

Almost surely, 2^161103558 is an apocalyptic number.

161103558 is an abundant number, since it is smaller than the sum of its proper divisors (240610362).

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

161103558 is a wasteful number, since it uses less digits than its factorization.

161103558 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 348732.

The product of its (nonzero) digits is 3600, while the sum is 30.

The square root of 161103558 is about 12692.6576413295. The cubic root of 161103558 is about 544.1287969079.

The spelling of 161103558 in words is "one hundred sixty-one million, one hundred three thousand, five hundred fifty-eight".