149961756 has 144 divisors (see below), whose sum is σ = 443304960. Its totient is φ = 39191040.

The previous prime is 149961739. The next prime is 149961767. The reversal of 149961756 is 657169941.

It is a happy number.

Its product of digits (408240) is a multiple of the sum of its prime factors (504).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 346116 + ... + 346548.

Almost surely, 2^149961756 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 149961756, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221652480).

149961756 is an abundant number, since it is smaller than the sum of its proper divisors (293343204).

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

149961756 is a wasteful number, since it uses less digits than its factorization.

149961756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 504 (or 495 counting only the distinct ones).

The product of its digits is 408240, while the sum is 48.

The square root of 149961756 is about 12245.8873096236. The cubic root of 149961756 is about 531.2841248483.

The spelling of 149961756 in words is "one hundred forty-nine million, nine hundred sixty-one thousand, seven hundred fifty-six".