32131043440 has 80 divisors (see below), whose sum is σ = 76580143200. Its totient is φ = 12533723136.

The previous prime is 32131043407. The next prime is 32131043473. The reversal of 32131043440 is 4434013123.

It is an interprime number because it is at equal distance from previous prime (32131043407) and next prime (32131043473).

It is a tau number, because it is divible by the number of its divisors (80).

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 15 ways as a sum of consecutive naturals, for example, 488851 + ... + 550669.

It is an arithmetic number, because the mean of its divisors is an integer number (957251790).

Almost surely, 2^32131043440 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 32131043440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38290071600).

32131043440 is an abundant number, since it is smaller than the sum of its proper divisors (44449099760).

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

32131043440 is a wasteful number, since it uses less digits than its factorization.

32131043440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61994 (or 61988 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

Adding to 32131043440 its reverse (4434013123), we get a palindrome (36565056563).

The spelling of 32131043440 in words is "thirty-two billion, one hundred thirty-one million, forty-three thousand, four hundred forty".