16157657 has 4 divisors (see below), whose sum is σ = 17008080. Its totient is φ = 15307236.

The previous prime is 16157639. The next prime is 16157699. The reversal of 16157657 is 75675161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75675161 = 293 ⋅258277.

It is not a de Polignac number, because 16157657 - 2⁶ = 16157593 is a prime.

It is a super-2 number, since 2×16157657² = 522139759459298, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 16157657.

It is not an unprimeable number, because it can be changed into a prime (16157627) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 425183 + ... + 425220.

It is an arithmetic number, because the mean of its divisors is an integer number (4252020).

Almost surely, 2^16157657 is an apocalyptic number.

It is an amenable number.

16157657 is a deficient number, since it is larger than the sum of its proper divisors (850423).

16157657 is an equidigital number, since it uses as much as digits as its factorization.

16157657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 850422.

The product of its digits is 44100, while the sum is 38.

The square root of 16157657 is about 4019.6588163674. The cubic root of 16157657 is about 252.8091537254.

The spelling of 16157657 in words is "sixteen million, one hundred fifty-seven thousand, six hundred fifty-seven".