158930592921 has 9 divisors (see below), whose sum is σ = 229568139541. Its totient is φ = 105952931292.

The previous prime is 158930592913. The next prime is 158930592971. The reversal of 158930592921 is 129295039851.

It is a happy number.

The square root of 158930592921 is 398661.

It is a perfect power (a square), and thus also a powerful number.

158930592921 is a `hidden beast` number, since 1 + 589 + 3 + 0 + 59 + 2 + 9 + 2 + 1 = 666.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 158930592921 - 2³ = 158930592913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158930592971) 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 8 ways as a sum of consecutive naturals, for example, 1129540 + ... + 1262426.

Almost surely, 2^158930592921 is an apocalyptic number.

158930592921 is the 398661-st square number.

158930592921 is the 199331-st centered octagonal number.

It is an amenable number.

158930592921 is a deficient number, since it is larger than the sum of its proper divisors (70637546620).

158930592921 is an frugal number, since it uses more digits than its factorization.

158930592921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 265780 (or 132890 counting only the distinct ones).

The product of its (nonzero) digits is 1749600, while the sum is 54.

The spelling of 158930592921 in words is "one hundred fifty-eight billion, nine hundred thirty million, five hundred ninety-two thousand, nine hundred twenty-one".