158998372516 has 9 divisors (see below), whose sum is σ = 278248547521. Its totient is φ = 79498787512.

The previous prime is 158998372453. The next prime is 158998372597. The reversal of 158998372516 is 615273899851.

It is a happy number.

The square root of 158998372516 is 398746.

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., 90090022500 + 68908350016 = 300150^2 + 262504^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 697806 + ... + 897178.

Almost surely, 2^158998372516 is an apocalyptic number.

158998372516 is the 398746-th square number.

It is an amenable number.

158998372516 is a deficient number, since it is larger than the sum of its proper divisors (119250175005).

158998372516 is an frugal number, since it uses more digits than its factorization.

158998372516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398750 (or 199375 counting only the distinct ones).

The product of its digits is 32659200, while the sum is 64.

Multiplying 158998372516 by its sum of digits (64), we get a square (10175895841024 = 3189968²).

The spelling of 158998372516 in words is "one hundred fifty-eight billion, nine hundred ninety-eight million, three hundred seventy-two thousand, five hundred sixteen".