158978601 has 6 divisors (see below), whose sum is σ = 229635770. Its totient is φ = 105985728.

The previous prime is 158978593. The next prime is 158978621. The reversal of 158978601 is 106879851.

158978601 is a `hidden beast` number, since 1 + 589 + 7 + 8 + 60 + 1 = 666.

158978601 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 144576576 + 14402025 = 12024^2 + 3795^2 .

It is not a de Polignac number, because 158978601 - 2³ = 158978593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158978621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 8832136 + ... + 8832153.

Almost surely, 2^158978601 is an apocalyptic number.

It is an amenable number.

158978601 is a deficient number, since it is larger than the sum of its proper divisors (70657169).

158978601 is a wasteful number, since it uses less digits than its factorization.

158978601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17664295 (or 17664292 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 158978601 is about 12608.6716588227. The cubic root of 158978601 is about 541.7258466097.

The spelling of 158978601 in words is "one hundred fifty-eight million, nine hundred seventy-eight thousand, six hundred one".