2545471840 has 24 divisors (see below), whose sum is σ = 6013677600. Its totient is φ = 1018188672.

The previous prime is 2545471837. The next prime is 2545471849. The reversal of 2545471840 is 481745452.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 2545471793 and 2545471802.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2545471849) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7954440 + ... + 7954759.

It is an arithmetic number, because the mean of its divisors is an integer number (250569900).

Almost surely, 2^2545471840 is an apocalyptic number.

2545471840 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2545471840 is an abundant number, since it is smaller than the sum of its proper divisors (3468205760).

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

2545471840 is a wasteful number, since it uses less digits than its factorization.

2545471840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15909214 (or 15909206 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 40.

The square root of 2545471840 is about 50452.6693050031. The cubic root of 2545471840 is about 1365.3880544559.

The spelling of 2545471840 in words is "two billion, five hundred forty-five million, four hundred seventy-one thousand, eight hundred forty".