25026566642 has 96 divisors (see below), whose sum is σ = 50713128000. Its totient is φ = 9132963840.

The previous prime is 25026566599. The next prime is 25026566647. The reversal of 25026566642 is 24666562052.

It is a junction number, because it is equal to n+sod(n) for n = 25026566593 and 25026566602.

It is not an unprimeable number, because it can be changed into a prime (25026566647) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1816034 + ... + 1829762.

It is an arithmetic number, because the mean of its divisors is an integer number (528261750).

Almost surely, 2^25026566642 is an apocalyptic number.

25026566642 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

25026566642 is an abundant number, since it is smaller than the sum of its proper divisors (25686561358).

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

25026566642 is a wasteful number, since it uses less digits than its factorization.

25026566642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13864 (or 13857 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 25026566642 in words is "twenty-five billion, twenty-six million, five hundred sixty-six thousand, six hundred forty-two".