2545647064 has 64 divisors (see below), whose sum is σ = 5030683200. Its totient is φ = 1206374400.

The previous prime is 2545647023. The next prime is 2545647067. The reversal of 2545647064 is 4607465452.

It is a self number, because there is not a number n which added to its sum of digits gives 2545647064.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545647067) 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, 1869744 + ... + 1871104.

It is an arithmetic number, because the mean of its divisors is an integer number (78604425).

Almost surely, 2^2545647064 is an apocalyptic number.

It is an amenable number.

2545647064 is a deficient number, since it is larger than the sum of its proper divisors (2485036136).

2545647064 is a wasteful number, since it uses less digits than its factorization.

2545647064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1564 (or 1560 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 43.

The square root of 2545647064 is about 50454.4057937461. The cubic root of 2545647064 is about 1365.4193837185.

The spelling of 2545647064 in words is "two billion, five hundred forty-five million, six hundred forty-seven thousand, sixty-four".