2563849920 has 56 divisors (see below), whose sum is σ = 8140226544. Its totient is φ = 683693056.

The previous prime is 2563849919. The next prime is 2563849933. The reversal of 2563849920 is 299483652.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 2563849920.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1334379 + ... + 1336298.

Almost surely, 2^2563849920 is an apocalyptic number.

2563849920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2563849920 is an abundant number, since it is smaller than the sum of its proper divisors (5576376624).

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

2563849920 is a wasteful number, since it uses less digits than its factorization.

2563849920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670697 (or 2670687 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 48.

The square root of 2563849920 is about 50634.4736321017. The cubic root of 2563849920 is about 1368.6661712176. Note that the first 3 decimals are identical.

The spelling of 2563849920 in words is "two billion, five hundred sixty-three million, eight hundred forty-nine thousand, nine hundred twenty".