2562645820 has 24 divisors (see below), whose sum is σ = 6150350304. Its totient is φ = 878621376.

The previous prime is 2562645791. The next prime is 2562645823. The reversal of 2562645820 is 285462652.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2562645823) 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, 9152167 + ... + 9152446.

It is an arithmetic number, because the mean of its divisors is an integer number (256264596).

Almost surely, 2^2562645820 is an apocalyptic number.

2562645820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2562645820 is an abundant number, since it is smaller than the sum of its proper divisors (3587704484).

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

2562645820 is a wasteful number, since it uses less digits than its factorization.

2562645820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18304629 (or 18304627 counting only the distinct ones).

The product of its (nonzero) digits is 230400, while the sum is 40.

The square root of 2562645820 is about 50622.5821150996. The cubic root of 2562645820 is about 1368.4518751331.

The spelling of 2562645820 in words is "two billion, five hundred sixty-two million, six hundred forty-five thousand, eight hundred twenty".