158481191394 has 24 divisors (see below), whose sum is σ = 343642354380. Its totient is φ = 52786073088.

The previous prime is 158481191387. The next prime is 158481191411. The reversal of 158481191394 is 493191184851.

158481191394 is a `hidden beast` number, since 1 + 58 + 481 + 19 + 13 + 94 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 155462238369 + 3018953025 = 394287^2 + 54945^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 158481191394.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3392047 + ... + 3438450.

Almost surely, 2^158481191394 is an apocalyptic number.

158481191394 is an abundant number, since it is smaller than the sum of its proper divisors (185161162986).

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

158481191394 is a wasteful number, since it uses less digits than its factorization.

158481191394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6831794 (or 6831791 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 54.

The spelling of 158481191394 in words is "one hundred fifty-eight billion, four hundred eighty-one million, one hundred ninety-one thousand, three hundred ninety-four".