32561251100 has 72 divisors (see below), whose sum is σ = 81074060928. Its totient is φ = 11119320000.

The previous prime is 32561251057. The next prime is 32561251103. The reversal of 32561251100 is 115216523.

It is a self number, because there is not a number n which added to its sum of digits gives 32561251100.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (32561251103) by changing a digit.

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, 83039 + ... + 268361.

It is an arithmetic number, because the mean of its divisors is an integer number (1126028624).

Almost surely, 2^32561251100 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 32561251100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40537030464).

32561251100 is an abundant number, since it is smaller than the sum of its proper divisors (48512809828).

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

32561251100 is a wasteful number, since it uses less digits than its factorization.

32561251100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185595 (or 185588 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 26.

Adding to 32561251100 its reverse (115216523), we get a palindrome (32676467623).

The spelling of 32561251100 in words is "thirty-two billion, five hundred sixty-one million, two hundred fifty-one thousand, one hundred".