157994506 has 8 divisors (see below), whose sum is σ = 237500640. Its totient is φ = 78827628.

The previous prime is 157994503. The next prime is 157994533. The reversal of 157994506 is 605499751.

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

It is not an unprimeable number, because it can be changed into a prime (157994503) by changing a digit.

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, 83646 + ... + 85513.

It is an arithmetic number, because the mean of its divisors is an integer number (29687580).

Almost surely, 2^157994506 is an apocalyptic number.

157994506 is a deficient number, since it is larger than the sum of its proper divisors (79506134).

157994506 is a wasteful number, since it uses less digits than its factorization.

157994506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169628.

The product of its (nonzero) digits is 340200, while the sum is 46.

The square root of 157994506 is about 12569.5865484908. The cubic root of 157994506 is about 540.6057514213.

The spelling of 157994506 in words is "one hundred fifty-seven million, nine hundred ninety-four thousand, five hundred six".