158172197994 has 48 divisors (see below), whose sum is σ = 360854002080. Its totient is φ = 49933830240.

The previous prime is 158172197971. The next prime is 158172197999. The reversal of 158172197994 is 499791271851.

It is not an unprimeable number, because it can be changed into a prime (158172197999) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1075584 + ... + 1213764.

It is an arithmetic number, because the mean of its divisors is an integer number (7517791710).

Almost surely, 2^158172197994 is an apocalyptic number.

158172197994 is an abundant number, since it is smaller than the sum of its proper divisors (202681804086).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

158172197994 is a wasteful number, since it uses less digits than its factorization.

158172197994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141555 (or 141552 counting only the distinct ones).

The product of its digits is 11430720, while the sum is 63.

The spelling of 158172197994 in words is "one hundred fifty-eight billion, one hundred seventy-two million, one hundred ninety-seven thousand, nine hundred ninety-four".