158898701641 has 3 divisors (see below), whose sum is σ = 158899100263. Its totient is φ = 158898303020.

The previous prime is 158898701629. The next prime is 158898701651. The reversal of 158898701641 is 146107898851.

The square root of 158898701641 is 398621.

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

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 83042525241 + 75856176400 = 288171^2 + 275420^2 .

It is a de Polignac number, because none of the positive numbers 2^k-158898701641 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158898701651) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 199311 + ... + 597931.

Almost surely, 2^158898701641 is an apocalyptic number.

158898701641 is the 398621-st square number.

158898701641 is the 199311-st centered octagonal number.

It is an amenable number.

158898701641 is a deficient number, since it is larger than the sum of its proper divisors (398622).

158898701641 is an frugal number, since it uses more digits than its factorization.

158898701641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 797242 (or 398621 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 58.

The spelling of 158898701641 in words is "one hundred fifty-eight billion, eight hundred ninety-eight million, seven hundred one thousand, six hundred forty-one".