2809847157 has 16 divisors (see below), whose sum is σ = 4043867520. Its totient is φ = 1725187392.

The previous prime is 2809847153. The next prime is 2809847179. The reversal of 2809847157 is 7517489082.

It is not a de Polignac number, because 2809847157 - 2² = 2809847153 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2809847153) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64938 + ... + 99179.

It is an arithmetic number, because the mean of its divisors is an integer number (252741720).

Almost surely, 2^2809847157 is an apocalyptic number.

It is an amenable number.

2809847157 is a deficient number, since it is larger than the sum of its proper divisors (1234020363).

2809847157 is a wasteful number, since it uses less digits than its factorization.

2809847157 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164572.

The product of its (nonzero) digits is 1128960, while the sum is 51.

The square root of 2809847157 is about 53007.9914446869. The cubic root of 2809847157 is about 1411.1100955605.

The spelling of 2809847157 in words is "two billion, eight hundred nine million, eight hundred forty-seven thousand, one hundred fifty-seven".