25233013640 has 64 divisors (see below), whose sum is σ = 60229733760. Its totient is φ = 9481190400.

The previous prime is 25233013613. The next prime is 25233013643. The reversal of 25233013640 is 4631033252.

It is not an unprimeable number, because it can be changed into a prime (25233013643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 320165 + ... + 391115.

It is an arithmetic number, because the mean of its divisors is an integer number (941089590).

Almost surely, 2^25233013640 is an apocalyptic number.

25233013640 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 25233013640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30114866880).

25233013640 is an abundant number, since it is smaller than the sum of its proper divisors (34996720120).

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

25233013640 is a wasteful number, since it uses less digits than its factorization.

25233013640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71502 (or 71498 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 29.

Adding to 25233013640 its reverse (4631033252), we get a palindrome (29864046892).

The spelling of 25233013640 in words is "twenty-five billion, two hundred thirty-three million, thirteen thousand, six hundred forty".