157644732025 has 27 divisors (see below), whose sum is σ = 214895629263. Its totient is φ = 114634832400.

The previous prime is 157644732013. The next prime is 157644732029. The reversal of 157644732025 is 520237446751.

The square root of 157644732025 is 397045.

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

It can be written as a sum of positive squares in only one way, i.e., 56752103529 + 100892628496 = 238227^2 + 317636^2 .

It is not a de Polignac number, because 157644732025 - 2⁹ = 157644731513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157644732029) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 21833866 + ... + 21841084.

Almost surely, 2^157644732025 is an apocalyptic number.

157644732025 is the 397045-th square number.

157644732025 is the 198523-rd centered octagonal number.

It is an amenable number.

157644732025 is a deficient number, since it is larger than the sum of its proper divisors (57250897238).

157644732025 is an frugal number, since it uses more digits than its factorization.

157644732025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14470 (or 7235 counting only the distinct ones).

The product of its (nonzero) digits is 1411200, while the sum is 46.

The spelling of 157644732025 in words is "one hundred fifty-seven billion, six hundred forty-four million, seven hundred thirty-two thousand, twenty-five".