158965677025 has 27 divisors (see below), whose sum is σ = 206119837651. Its totient is φ = 121608214640.

The previous prime is 158965677023. The next prime is 158965677037. The reversal of 158965677025 is 520776569851.

The square root of 158965677025 is 398705.

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

158965677025 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., 57227643729 + 101738033296 = 239223^2 + 318964^2 .

It is not a de Polignac number, because 158965677025 - 2¹ = 158965677023 is a prime.

It is a super-2 number, since 2×158965677025² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158965677023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 45849342 + ... + 45852808.

Almost surely, 2^158965677025 is an apocalyptic number.

158965677025 is the 398705-th square number.

158965677025 is the 199353-rd centered octagonal number.

It is an amenable number.

158965677025 is a deficient number, since it is larger than the sum of its proper divisors (47154160626).

158965677025 is an frugal number, since it uses more digits than its factorization.

158965677025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6990 (or 3495 counting only the distinct ones).

The product of its (nonzero) digits is 31752000, while the sum is 61.

It can be divided in two parts, 1589656 and 77025, that added together give a square (1666681 = 1291²).

The spelling of 158965677025 in words is "one hundred fifty-eight billion, nine hundred sixty-five million, six hundred seventy-seven thousand, twenty-five".