2545566840 has 96 divisors (see below), whose sum is σ = 8372866320. Its totient is φ = 670631424.

The previous prime is 2545566833. The next prime is 2545566853. The reversal of 2545566840 is 486655452.

2545566840 is a `hidden beast` number, since 2 + 5 + 4 + 5 + 566 + 84 + 0 = 666.

2545566840 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12717 + ... + 72476.

Almost surely, 2^2545566840 is an apocalyptic number.

2545566840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2545566840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4186433160).

2545566840 is an abundant number, since it is smaller than the sum of its proper divisors (5827299480).

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

2545566840 is a wasteful number, since it uses less digits than its factorization.

2545566840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85293 (or 85286 counting only the distinct ones).

The product of its (nonzero) digits is 1152000, while the sum is 45.

The square root of 2545566840 is about 50453.6107726692. The cubic root of 2545566840 is about 1365.4050402068.

The spelling of 2545566840 in words is "two billion, five hundred forty-five million, five hundred sixty-six thousand, eight hundred forty".