158221593194 has 12 divisors (see below), whose sum is σ = 276080535234. Its totient is φ = 67809254184.

The previous prime is 158221593181. The next prime is 158221593251. The reversal of 158221593194 is 491395122851.

It can be written as a sum of positive squares in only one way, i.e., 156060552025 + 2161041169 = 395045^2 + 46487^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 807252929 + ... + 807253124.

Almost surely, 2^158221593194 is an apocalyptic number.

158221593194 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

158221593194 is a deficient number, since it is larger than the sum of its proper divisors (117858942040).

158221593194 is a wasteful number, since it uses less digits than its factorization.

158221593194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614506069 (or 1614506062 counting only the distinct ones).

The product of its digits is 777600, while the sum is 50.

The spelling of 158221593194 in words is "one hundred fifty-eight billion, two hundred twenty-one million, five hundred ninety-three thousand, one hundred ninety-four".