25621043040372 has 96 divisors (see below), whose sum is σ = 65293356441600. Its totient is φ = 7771709554560.

The previous prime is 25621043040371. The next prime is 25621043040421. The reversal of 25621043040372 is 27304034012652.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 25621043040372.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25621043040371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 140607379 + ... + 140789477.

It is an arithmetic number, because the mean of its divisors is an integer number (680139129600).

Almost surely, 2^{25621043040372} 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 25621043040372, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32646678220800).

25621043040372 is an abundant number, since it is smaller than the sum of its proper divisors (39672313401228).

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

25621043040372 is a wasteful number, since it uses less digits than its factorization.

25621043040372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194893 (or 194891 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 39.

The spelling of 25621043040372 in words is "twenty-five trillion, six hundred twenty-one billion, forty-three million, forty thousand, three hundred seventy-two".