25626599680 has 216 divisors, whose sum is σ = 71447598936. Its totient is φ = 8769699840.

The previous prime is 25626599659. The next prime is 25626599683. The reversal of 25626599680 is 8699562652.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 10099446016 + 15527153664 = 100496^2 + 124608^2 .

It is a super-2 number, since 2×25626599680² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25626599683) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2628094 + ... + 2637826.

It is an arithmetic number, because the mean of its divisors is an integer number (330775921).

Almost surely, 2^25626599680 is an apocalyptic number.

25626599680 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 25626599680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35723799468).

25626599680 is an abundant number, since it is smaller than the sum of its proper divisors (45820999256).

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

25626599680 is a wasteful number, since it uses less digits than its factorization.

25626599680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9793 (or 9768 counting only the distinct ones).

The product of its (nonzero) digits is 13996800, while the sum is 58.

The spelling of 25626599680 in words is "twenty-five billion, six hundred twenty-six million, five hundred ninety-nine thousand, six hundred eighty".