158045681 has 8 divisors (see below), whose sum is σ = 159164160. Its totient is φ = 156931488.

The previous prime is 158045677. The next prime is 158045687. The reversal of 158045681 is 186540851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 158045681 - 2² = 158045677 is a prime.

It is a super-2 number, since 2×158045681² = 49956874565507522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158045687) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108500 + ... + 109946.

It is an arithmetic number, because the mean of its divisors is an integer number (19895520).

Almost surely, 2^158045681 is an apocalyptic number.

It is an amenable number.

158045681 is a deficient number, since it is larger than the sum of its proper divisors (1118479).

158045681 is a wasteful number, since it uses less digits than its factorization.

158045681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2143.

The product of its (nonzero) digits is 38400, while the sum is 38.

The square root of 158045681 is about 12571.6220512709. The cubic root of 158045681 is about 540.6641131825.

The spelling of 158045681 in words is "one hundred fifty-eight million, forty-five thousand, six hundred eighty-one".