2564845662 has 16 divisors (see below), whose sum is σ = 5130187920. Its totient is φ = 854865792.

The previous prime is 2564845649. The next prime is 2564845669. The reversal of 2564845662 is 2665484652.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2564845669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108588 + ... + 130080.

It is an arithmetic number, because the mean of its divisors is an integer number (320636745).

Almost surely, 2^2564845662 is an apocalyptic number.

2564845662 is an abundant number, since it is smaller than the sum of its proper divisors (2565342258).

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

2564845662 is a wasteful number, since it uses less digits than its factorization.

2564845662 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41387.

The product of its digits is 2764800, while the sum is 48.

The square root of 2564845662 is about 50644.3053264629. The cubic root of 2564845662 is about 1368.8433347334.

The spelling of 2564845662 in words is "two billion, five hundred sixty-four million, eight hundred forty-five thousand, six hundred sixty-two".