149191518 has 16 divisors (see below), whose sum is σ = 341009280. Its totient is φ = 42626136.

The previous prime is 149191481. The next prime is 149191571. The reversal of 149191518 is 815191941.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1776048 + ... + 1776131.

It is an arithmetic number, because the mean of its divisors is an integer number (21313080).

Almost surely, 2^149191518 is an apocalyptic number.

149191518 is an abundant number, since it is smaller than the sum of its proper divisors (191817762).

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

149191518 is a wasteful number, since it uses less digits than its factorization.

149191518 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3552191.

The product of its digits is 12960, while the sum is 39.

The square root of 149191518 is about 12214.3979794339. The cubic root of 149191518 is about 530.3729640153.

The spelling of 149191518 in words is "one hundred forty-nine million, one hundred ninety-one thousand, five hundred eighteen".