149889664 has 32 divisors (see below), whose sum is σ = 306688500. Its totient is φ = 72916992.

The previous prime is 149889637. The next prime is 149889683. The reversal of 149889664 is 466988941.

It can be written as a sum of positive squares in 2 ways, for example, as 122766400 + 27123264 = 11080^2 + 5208^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is a super-2 number, since 2×149889664² = 44933822748065792, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11089 + ... + 20560.

Almost surely, 2^149889664 is an apocalyptic number.

It is an amenable number.

149889664 is an abundant number, since it is smaller than the sum of its proper divisors (156798836).

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

149889664 is an equidigital number, since it uses as much as digits as its factorization.

149889664 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31700 (or 31688 counting only the distinct ones).

The product of its digits is 2985984, while the sum is 55.

The square root of 149889664 is about 12242.9434369354. The cubic root of 149889664 is about 531.1989754178.

The spelling of 149889664 in words is "one hundred forty-nine million, eight hundred eighty-nine thousand, six hundred sixty-four".