2581209888 has 48 divisors (see below), whose sum is σ = 7132295520. Its totient is φ = 815118336.

The previous prime is 2581209887. The next prime is 2581209919. The reversal of 2581209888 is 8889021852.

It is a tau number, because it is divible by the number of its divisors (48).

It is a self number, because there is not a number n which added to its sum of digits gives 2581209888.

It is not an unprimeable number, because it can be changed into a prime (2581209887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 705745 + ... + 709392.

It is an arithmetic number, because the mean of its divisors is an integer number (148589490).

Almost surely, 2^2581209888 is an apocalyptic number.

It is an amenable number.

2581209888 is an abundant number, since it is smaller than the sum of its proper divisors (4551085632).

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

2581209888 is a wasteful number, since it uses less digits than its factorization.

2581209888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415169 (or 1415161 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 51.

The square root of 2581209888 is about 50805.6088242233. The cubic root of 2581209888 is about 1371.7483296566.

The spelling of 2581209888 in words is "two billion, five hundred eighty-one million, two hundred nine thousand, eight hundred eighty-eight".