25446347660 has 48 divisors (see below), whose sum is σ = 56716057440. Its totient is φ = 9556884480.

The previous prime is 25446347629. The next prime is 25446347669. The reversal of 25446347660 is 6674364452.

It is not an unprimeable number, because it can be changed into a prime (25446347669) 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 15 ways as a sum of consecutive naturals, for example, 53150 + ... + 231770.

It is an arithmetic number, because the mean of its divisors is an integer number (1181584530).

Almost surely, 2^25446347660 is an apocalyptic number.

25446347660 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 25446347660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28358028720).

25446347660 is an abundant number, since it is smaller than the sum of its proper divisors (31269709780).

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

25446347660 is a wasteful number, since it uses less digits than its factorization.

25446347660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179066 (or 179064 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 47.

The spelling of 25446347660 in words is "twenty-five billion, four hundred forty-six million, three hundred forty-seven thousand, six hundred sixty".