157716638 has 8 divisors (see below), whose sum is σ = 237103200. Its totient is φ = 78682240.

The previous prime is 157716577. The next prime is 157716673. The reversal of 157716638 is 836617751.

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

It is a congruent 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, 86918 + ... + 88713.

It is an arithmetic number, because the mean of its divisors is an integer number (29637900).

Almost surely, 2^157716638 is an apocalyptic number.

157716638 is a deficient number, since it is larger than the sum of its proper divisors (79386562).

157716638 is a wasteful number, since it uses less digits than its factorization.

157716638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176082.

The product of its digits is 211680, while the sum is 44.

The square root of 157716638 is about 12558.5284966034. The cubic root of 157716638 is about 540.2886408414.

The spelling of 157716638 in words is "one hundred fifty-seven million, seven hundred sixteen thousand, six hundred thirty-eight".