4157857209 has 32 divisors (see below), whose sum is σ = 6200561664. Its totient is φ = 2456679680.

The previous prime is 4157857183. The next prime is 4157857217. The reversal of 4157857209 is 9027587514.

It is a cyclic number.

It is not a de Polignac number, because 4157857209 - 2¹² = 4157853113 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (4157857259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 402817 + ... + 413009.

It is an arithmetic number, because the mean of its divisors is an integer number (193767552).

Almost surely, 2^4157857209 is an apocalyptic number.

It is an amenable number.

4157857209 is a deficient number, since it is larger than the sum of its proper divisors (2042704455).

4157857209 is a wasteful number, since it uses less digits than its factorization.

4157857209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10517.

The product of its (nonzero) digits is 705600, while the sum is 48.

The square root of 4157857209 is about 64481.4485646841. The cubic root of 4157857209 is about 1608.0141157860.

The spelling of 4157857209 in words is "four billion, one hundred fifty-seven million, eight hundred fifty-seven thousand, two hundred nine".