149561616 has 40 divisors (see below), whose sum is σ = 406705120. Its totient is φ = 47229696.

The previous prime is 149561591. The next prime is 149561623. The reversal of 149561616 is 616165941.

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, 81085 + ... + 82908.

It is an arithmetic number, because the mean of its divisors is an integer number (10167628).

Almost surely, 2^149561616 is an apocalyptic number.

149561616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

149561616 is an abundant number, since it is smaller than the sum of its proper divisors (257143504).

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

149561616 is a wasteful number, since it uses less digits than its factorization.

149561616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164023 (or 164017 counting only the distinct ones).

The product of its digits is 38880, while the sum is 39.

The square root of 149561616 is about 12229.5386666873. The cubic root of 149561616 is about 530.8111656138.

The spelling of 149561616 in words is "one hundred forty-nine million, five hundred sixty-one thousand, six hundred sixteen".