25444616106 has 64 divisors (see below), whose sum is σ = 62722195200. Its totient is φ = 6701101056.

The previous prime is 25444616101. The next prime is 25444616143. The reversal of 25444616106 is 60161644452.

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

It is not an unprimeable number, because it can be changed into a prime (25444616101) 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 31 ways as a sum of consecutive naturals, for example, 354250 + ... + 419978.

It is an arithmetic number, because the mean of its divisors is an integer number (980034300).

Almost surely, 2^25444616106 is an apocalyptic number.

25444616106 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 25444616106, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31361097600).

25444616106 is an abundant number, since it is smaller than the sum of its proper divisors (37277579094).

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

25444616106 is a wasteful number, since it uses less digits than its factorization.

25444616106 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66463.

The product of its (nonzero) digits is 138240, while the sum is 39.

The spelling of 25444616106 in words is "twenty-five billion, four hundred forty-four million, six hundred sixteen thousand, one hundred six".