157881194 has 8 divisors (see below), whose sum is σ = 239482980. Its totient is φ = 78053536.

The previous prime is 157881187. The next prime is 157881253. The reversal of 157881194 is 491188751.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 136025569 + 21855625 = 11663^2 + 4675^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 443309 + ... + 443664.

Almost surely, 2^157881194 is an apocalyptic number.

157881194 is a deficient number, since it is larger than the sum of its proper divisors (81601786).

157881194 is an equidigital number, since it uses as much as digits as its factorization.

157881194 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 887064.

The product of its digits is 80640, while the sum is 44.

The square root of 157881194 is about 12565.0783523224. The cubic root of 157881194 is about 540.4764815908.

The spelling of 157881194 in words is "one hundred fifty-seven million, eight hundred eighty-one thousand, one hundred ninety-four".