2591989632 has 192 divisors, whose sum is σ = 7796880000. Its totient is φ = 857101824.

The previous prime is 2591989571. The next prime is 2591989649. The reversal of 2591989632 is 2369891952.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5194119 + ... + 5194617.

It is an arithmetic number, because the mean of its divisors is an integer number (40608750).

Almost surely, 2^2591989632 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2591989632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3898440000).

2591989632 is an abundant number, since it is smaller than the sum of its proper divisors (5204890368).

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

2591989632 is an equidigital number, since it uses as much as digits as its factorization.

2591989632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695 (or 671 counting only the distinct ones).

The product of its digits is 2099520, while the sum is 54.

The square root of 2591989632 is about 50911.5864219531. The cubic root of 2591989632 is about 1373.6552595188.

It can be divided in two parts, 259 and 1989632, that added together give a palindrome (1989891).

The spelling of 2591989632 in words is "two billion, five hundred ninety-one million, nine hundred eighty-nine thousand, six hundred thirty-two".