25444666080 has 504 divisors, whose sum is σ = 93539718216. Its totient is φ = 6537438720.

The previous prime is 25444666063. The next prime is 25444666081. The reversal of 25444666080 is 8066644452.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25444666081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 83 ways as a sum of consecutive naturals, for example, 112090927 + ... + 112091153.

It is an arithmetic number, because the mean of its divisors is an integer number (185594679).

Almost surely, 2^25444666080 is an apocalyptic number.

25444666080 is a gapful number since it is divisible by the number (20) 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 25444666080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46769859108).

25444666080 is an abundant number, since it is smaller than the sum of its proper divisors (68095052136).

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

25444666080 is an equidigital number, since it uses as much as digits as its factorization.

25444666080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 322 (or 268 counting only the distinct ones).

The product of its (nonzero) digits is 1105920, while the sum is 45.

The spelling of 25444666080 in words is "twenty-five billion, four hundred forty-four million, six hundred sixty-six thousand, eighty".