157638169 has 8 divisors (see below), whose sum is σ = 169972992. Its totient is φ = 145333200.

The previous prime is 157638163. The next prime is 157638179. The reversal of 157638169 is 961836751.

It is a happy number.

157638169 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 157638169 - 2⁹ = 157637657 is a prime.

It is a super-2 number, since 2×157638169² = 49699584651345122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (157638163) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4194 + ... + 18244.

It is an arithmetic number, because the mean of its divisors is an integer number (21246624).

Almost surely, 2^157638169 is an apocalyptic number.

It is an amenable number.

157638169 is a deficient number, since it is larger than the sum of its proper divisors (12334823).

157638169 is a wasteful number, since it uses less digits than its factorization.

157638169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14927.

The product of its digits is 272160, while the sum is 46.

The square root of 157638169 is about 12555.4039759778. The cubic root of 157638169 is about 540.1990224326.

It can be divided in two parts, 15763 and 8169, that added together give a palindrome (23932).

The spelling of 157638169 in words is "one hundred fifty-seven million, six hundred thirty-eight thousand, one hundred sixty-nine".