149561622 has 72 divisors (see below), whose sum is σ = 387228816. Its totient is φ = 41567904.

The previous prime is 149561591. The next prime is 149561623. The reversal of 149561622 is 226165941.

149561622 is a `hidden beast` number, since 1 + 495 + 6 + 162 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149561623) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 30343 + ... + 34925.

It is an arithmetic number, because the mean of its divisors is an integer number (5378178).

Almost surely, 2^149561622 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149561622, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193614408).

149561622 is an abundant number, since it is smaller than the sum of its proper divisors (237667194).

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

149561622 is a wasteful number, since it uses less digits than its factorization.

149561622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4642 (or 4632 counting only the distinct ones).

The product of its digits is 25920, while the sum is 36.

The square root of 149561622 is about 12229.5389119950. The cubic root of 149561622 is about 530.8111727120.

The spelling of 149561622 in words is "one hundred forty-nine million, five hundred sixty-one thousand, six hundred twenty-two".