2544406564 has 12 divisors (see below), whose sum is σ = 5088813184. Its totient is φ = 1090459944.

The previous prime is 2544406559. The next prime is 2544406567. The reversal of 2544406564 is 4656044452.

It is a happy number.

2544406564 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2544406567) 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, 45435804 + ... + 45435859.

Almost surely, 2^2544406564 is an apocalyptic number.

It is an amenable number.

2544406564 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

2544406564 is a wasteful number, since it uses less digits than its factorization.

2544406564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90871674 (or 90871672 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 40.

The square root of 2544406564 is about 50442.1110184734. Note that the first 3 decimals coincide. The cubic root of 2544406564 is about 1365.1975569545.

The spelling of 2544406564 in words is "two billion, five hundred forty-four million, four hundred six thousand, five hundred sixty-four".