158439995417025 has 243 divisors, whose sum is σ = 332040651662889. Its totient is φ = 72009800029440.

The previous prime is 158439995417017. The next prime is 158439995417057. The reversal of 158439995417025 is 520714599934851.

It is a happy number.

The square root of 158439995417025 is 12587295.

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

158439995417025 is a `hidden beast` number, since 1 + 5 + 8 + 4 + 3 + 9 + 9 + 9 + 541 + 70 + 2 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 89008639244721 + 69431356172304 = 9434439^2 + 8332548^2 .

It is not a de Polignac number, because 158439995417025 - 2³ = 158439995417017 is a prime.

It is a Smith number, since the sum of its digits (72) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 242 ways as a sum of consecutive naturals, for example, 413681449984 + ... + 413681450366.

Almost surely, 2^{158439995417025} is an apocalyptic number.

158439995417025 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

158439995417025 is the 12587295-th square number.

158439995417025 is the 6293648-th centered octagonal number.

It is an amenable number.

158439995417025 is an abundant number, since it is smaller than the sum of its proper divisors (173600656245864).

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

158439995417025 is an frugal number, since it uses more digits than its factorization.

158439995417025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1422 (or 711 counting only the distinct ones).

The product of its (nonzero) digits is 489888000, while the sum is 72.

The spelling of 158439995417025 in words is "one hundred fifty-eight trillion, four hundred thirty-nine billion, nine hundred ninety-five million, four hundred seventeen thousand, twenty-five".