2591861888 has 256 divisors, whose sum is σ = 7050240000. Its totient is φ = 917913600.

The previous prime is 2591861873. The next prime is 2591861891. The reversal of 2591861888 is 8881681952.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5193863 + ... + 5194361.

It is an arithmetic number, because the mean of its divisors is an integer number (27540000).

Almost surely, 2^2591861888 is an apocalyptic number.

2591861888 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2591861888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3525120000).

2591861888 is an abundant number, since it is smaller than the sum of its proper divisors (4458378112).

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

2591861888 is a wasteful number, since it uses less digits than its factorization.

2591861888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579 (or 567 counting only the distinct ones).

The product of its digits is 2211840, while the sum is 56.

The square root of 2591861888 is about 50910.3318394214. The cubic root of 2591861888 is about 1373.6326926718.

The spelling of 2591861888 in words is "two billion, five hundred ninety-one million, eight hundred sixty-one thousand, eight hundred eighty-eight".