2856645373 has 4 divisors (see below), whose sum is σ = 2873157948. Its totient is φ = 2840132800.

The previous prime is 2856645263. The next prime is 2856645403. The reversal of 2856645373 is 3735466582.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2353899289 + 502746084 = 48517^2 + 22422^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2856645373 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2856645073) 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, 8256028 + ... + 8256373.

It is an arithmetic number, because the mean of its divisors is an integer number (718289487).

Almost surely, 2^2856645373 is an apocalyptic number.

It is an amenable number.

2856645373 is a deficient number, since it is larger than the sum of its proper divisors (16512575).

2856645373 is a wasteful number, since it uses less digits than its factorization.

2856645373 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16512574.

The product of its digits is 3628800, while the sum is 49.

The square root of 2856645373 is about 53447.5946418546. The cubic root of 2856645373 is about 1418.9010496528.

The spelling of 2856645373 in words is "two billion, eight hundred fifty-six million, six hundred forty-five thousand, three hundred seventy-three".