158661432 has 24 divisors (see below), whose sum is σ = 429708240. Its totient is φ = 52887120.

The previous prime is 158661421. The next prime is 158661449. The reversal of 158661432 is 234166851.

It is a happy number.

158661432 is a `hidden beast` number, since 1 + 5 + 8 + 6 + 614 + 32 = 666.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1101744 + ... + 1101887.

It is an arithmetic number, because the mean of its divisors is an integer number (17904510).

Almost surely, 2^158661432 is an apocalyptic number.

158661432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

158661432 is an abundant number, since it is smaller than the sum of its proper divisors (271046808).

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

158661432 is a wasteful number, since it uses less digits than its factorization.

158661432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2203643 (or 2203636 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 158661432 is about 12596.0879641260. The cubic root of 158661432 is about 541.3653514810.

The spelling of 158661432 in words is "one hundred fifty-eight million, six hundred sixty-one thousand, four hundred thirty-two".