2545802857 has 4 divisors (see below), whose sum is σ = 2741633860. Its totient is φ = 2349971856.

The previous prime is 2545802851. The next prime is 2545802867. The reversal of 2545802857 is 7582085452.

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 1706020416 + 839782441 = 41304^2 + 28979^2 .

It is a cyclic number.

It is not a de Polignac number, because 2545802857 - 2³ = 2545802849 is a prime.

It is a super-2 number, since 2×2545802857² = 12962224373418724898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2545802851) 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, 97915482 + ... + 97915507.

It is an arithmetic number, because the mean of its divisors is an integer number (685408465).

Almost surely, 2^2545802857 is an apocalyptic number.

It is an amenable number.

2545802857 is a deficient number, since it is larger than the sum of its proper divisors (195831003).

2545802857 is a wasteful number, since it uses less digits than its factorization.

2545802857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195831002.

The product of its (nonzero) digits is 896000, while the sum is 46.

The square root of 2545802857 is about 50455.9496689934. The cubic root of 2545802857 is about 1365.4472375984.

The spelling of 2545802857 in words is "two billion, five hundred forty-five million, eight hundred two thousand, eight hundred fifty-seven".