2545783657 has 8 divisors (see below), whose sum is σ = 2585043392. Its totient is φ = 2506561200.

The previous prime is 2545783649. The next prime is 2545783663. The reversal of 2545783657 is 7563875452.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2545783657 - 2³ = 2545783649 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2545783627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 148732 + ... + 164962.

It is an arithmetic number, because the mean of its divisors is an integer number (323130424).

Almost surely, 2^2545783657 is an apocalyptic number.

It is an amenable number.

2545783657 is a deficient number, since it is larger than the sum of its proper divisors (39259735).

2545783657 is a wasteful number, since it uses less digits than its factorization.

2545783657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18639.

The product of its digits is 7056000, while the sum is 52.

The square root of 2545783657 is about 50455.7594036598. The cubic root of 2545783657 is about 1365.4438049350.

The spelling of 2545783657 in words is "two billion, five hundred forty-five million, seven hundred eighty-three thousand, six hundred fifty-seven".