159684156025 has 27 divisors (see below), whose sum is σ = 199448274951. Its totient is φ = 126825036480.

The previous prime is 159684155987. The next prime is 159684156059. The reversal of 159684156025 is 520651486951.

The square root of 159684156025 is 399605.

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

It can be written as a sum of positive squares in 13 ways, for example, as 4230591849 + 155453564176 = 65043^2 + 394276^2 .

It is not a de Polignac number, because 159684156025 - 2⁹ = 159684155513 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 457547551 + ... + 457547899.

Almost surely, 2^159684156025 is an apocalyptic number.

159684156025 is the 399605-th square number.

159684156025 is the 199803-rd centered octagonal number.

It is an amenable number.

159684156025 is a deficient number, since it is larger than the sum of its proper divisors (39764118926).

159684156025 is an frugal number, since it uses more digits than its factorization.

159684156025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166 (or 583 counting only the distinct ones).

The product of its (nonzero) digits is 2592000, while the sum is 52.

The spelling of 159684156025 in words is "one hundred fifty-nine billion, six hundred eighty-four million, one hundred fifty-six thousand, twenty-five".