25444044264 has 64 divisors (see below), whose sum is σ = 65388594240. Its totient is φ = 8244633600.

The previous prime is 25444044259. The next prime is 25444044289. The reversal of 25444044264 is 46244044452.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 1011439 + ... + 1036289.

It is an arithmetic number, because the mean of its divisors is an integer number (1021696785).

Almost surely, 2^25444044264 is an apocalyptic number.

25444044264 is a gapful number since it is divisible by the number (24) 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 25444044264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32694297120).

25444044264 is an abundant number, since it is smaller than the sum of its proper divisors (39944549976).

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

25444044264 is a wasteful number, since it uses less digits than its factorization.

25444044264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26050 (or 26046 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 39.

The spelling of 25444044264 in words is "twenty-five billion, four hundred forty-four million, forty-four thousand, two hundred sixty-four".