149091855 has 32 divisors (see below), whose sum is σ = 260817408. Its totient is φ = 72124800.

The previous prime is 149091851. The next prime is 149091883. The reversal of 149091855 is 558190941.

It is not a de Polignac number, because 149091855 - 2² = 149091851 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149091851) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 108382 + ... + 109748.

It is an arithmetic number, because the mean of its divisors is an integer number (8150544).

Almost surely, 2^149091855 is an apocalyptic number.

149091855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

149091855 is a deficient number, since it is larger than the sum of its proper divisors (111725553).

149091855 is a wasteful number, since it uses less digits than its factorization.

149091855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2047.

The product of its (nonzero) digits is 64800, while the sum is 42.

The square root of 149091855 is about 12210.3175634379. The cubic root of 149091855 is about 530.2548376946.

The spelling of 149091855 in words is "one hundred forty-nine million, ninety-one thousand, eight hundred fifty-five".