2545868533 has 4 divisors (see below), whose sum is σ = 2741704588. Its totient is φ = 2350032480.

The previous prime is 2545868483. The next prime is 2545868557. The reversal of 2545868533 is 3358685452.

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 1655025124 + 890843409 = 40682^2 + 29847^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2545868533 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 (2545868593) 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 3 ways as a sum of consecutive naturals, for example, 97918008 + ... + 97918033.

It is an arithmetic number, because the mean of its divisors is an integer number (685426147).

Almost surely, 2^2545868533 is an apocalyptic number.

It is an amenable number.

2545868533 is a deficient number, since it is larger than the sum of its proper divisors (195836055).

2545868533 is a wasteful number, since it uses less digits than its factorization.

2545868533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195836054.

The product of its digits is 3456000, while the sum is 49.

The square root of 2545868533 is about 50456.6004899260. The cubic root of 2545868533 is about 1365.4589793221.

The spelling of 2545868533 in words is "two billion, five hundred forty-five million, eight hundred sixty-eight thousand, five hundred thirty-three".