158259956761 has 9 divisors (see below), whose sum is σ = 160223104639. Its totient is φ = 156320589136.

The previous prime is 158259956759. The next prime is 158259956779. The reversal of 158259956761 is 167659952851.

The square root of 158259956761 is 397819.

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., 136726155225 + 21533801536 = 369765^2 + 146744^2 .

It is not a de Polignac number, because 158259956761 - 2¹ = 158259956759 is a prime.

It is a super-2 number, since 2×158259956761² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 158259956693 and 158259956702.

It is not an unprimeable number, because it can be changed into a prime (158259956711) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 33016581 + ... + 33021373.

Almost surely, 2^158259956761 is an apocalyptic number.

158259956761 is the 397819-th square number.

158259956761 is the 198910-th centered octagonal number.

It is an amenable number.

158259956761 is a deficient number, since it is larger than the sum of its proper divisors (1963147878).

158259956761 is an frugal number, since it uses more digits than its factorization.

158259956761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9752 (or 4876 counting only the distinct ones).

The product of its digits is 40824000, while the sum is 64.

Multiplying 158259956761 by its sum of digits (64), we get a square (10128637232704 = 3182552²).

The spelling of 158259956761 in words is "one hundred fifty-eight billion, two hundred fifty-nine million, nine hundred fifty-six thousand, seven hundred sixty-one".