25302423616 has 28 divisors (see below), whose sum is σ = 50727132988. Its totient is φ = 12520783872.

The previous prime is 25302423613. The next prime is 25302423617. The reversal of 25302423616 is 61632420352.

It can be written as a sum of positive squares in 2 ways, for example, as 3398423616 + 21904000000 = 58296^2 + 148000^2 .

It is not an unprimeable number, because it can be changed into a prime (25302423613) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2031681 + ... + 2044096.

It is an arithmetic number, because the mean of its divisors is an integer number (1811683321).

Almost surely, 2^25302423616 is an apocalyptic number.

It is an amenable number.

25302423616 is an abundant number, since it is smaller than the sum of its proper divisors (25424709372).

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

25302423616 is an equidigital number, since it uses as much as digits as its factorization.

25302423616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4075886 (or 4075876 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 34.

Adding to 25302423616 its reverse (61632420352), we get a palindrome (86934843968).

The spelling of 25302423616 in words is "twenty-five billion, three hundred two million, four hundred twenty-three thousand, six hundred sixteen".