25445389480 has 32 divisors (see below), whose sum is σ = 65431002240. Its totient is φ = 8724133440.

The previous prime is 25445389469. The next prime is 25445389483. The reversal of 25445389480 is 8498354452.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (25445389483) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45437916 + ... + 45438475.

It is an arithmetic number, because the mean of its divisors is an integer number (2044718820).

Almost surely, 2^25445389480 is an apocalyptic number.

25445389480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25445389480 is an abundant number, since it is smaller than the sum of its proper divisors (39985612760).

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

25445389480 is a wasteful number, since it uses less digits than its factorization.

25445389480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90876409 (or 90876405 counting only the distinct ones).

The product of its (nonzero) digits is 5529600, while the sum is 52.

The spelling of 25445389480 in words is "twenty-five billion, four hundred forty-five million, three hundred eighty-nine thousand, four hundred eighty".