2545664520 has 64 divisors (see below), whose sum is σ = 8727995520. Its totient is φ = 581865984.

The previous prime is 2545664519. The next prime is 2545664557. The reversal of 2545664520 is 254665452.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1514437 + ... + 1516116.

It is an arithmetic number, because the mean of its divisors is an integer number (136374930).

Almost surely, 2^2545664520 is an apocalyptic number.

2545664520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2545664520 is an abundant number, since it is smaller than the sum of its proper divisors (6182331000).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2545664520 is a wasteful number, since it uses less digits than its factorization.

2545664520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3030574 (or 3030570 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 39.

The square root of 2545664520 is about 50454.5787813158. The cubic root of 2545664520 is about 1365.4225046940.

The spelling of 2545664520 in words is "two billion, five hundred forty-five million, six hundred sixty-four thousand, five hundred twenty".