158723356801 has 9 divisors (see below), whose sum is σ = 161796166441. Its totient is φ = 155707859632.

The previous prime is 158723356769. The next prime is 158723356817. The reversal of 158723356801 is 108653327851.

The square root of 158723356801 is 398401.

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

It can be written as a sum of positive squares in 4 ways, for example, as 75294811201 + 83428545600 = 274399^2 + 288840^2 .

It is not a de Polignac number, because 158723356801 - 2⁵ = 158723356769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158723356861) 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, 21111495 + ... + 21119011.

Almost surely, 2^158723356801 is an apocalyptic number.

158723356801 is the 398401-st square number.

158723356801 is the 199201-st centered octagonal number.

It is an amenable number.

158723356801 is a deficient number, since it is larger than the sum of its proper divisors (3072809640).

158723356801 is an frugal number, since it uses more digits than its factorization.

158723356801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15140 (or 7570 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 49.

Multiplying 158723356801 by its sum of digits (49), we get a square (7777444483249 = 2788807²).

It can be divided in two parts, 158723 and 356801, that added together give a square (515524 = 718²).

The spelling of 158723356801 in words is "one hundred fifty-eight billion, seven hundred twenty-three million, three hundred fifty-six thousand, eight hundred one".