25469772240 has 160 divisors (see below), whose sum is σ = 86385470976. Its totient is φ = 6156474880.

The previous prime is 25469772239. The next prime is 25469772247. The reversal of 25469772240 is 4227796452.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 25469772240.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25469772247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 902179 + ... + 929981.

Almost surely, 2^25469772240 is an apocalyptic number.

25469772240 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 25469772240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43192735488).

25469772240 is an abundant number, since it is smaller than the sum of its proper divisors (60915698736).

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

25469772240 is a wasteful number, since it uses less digits than its factorization.

25469772240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28177 (or 28171 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 48.

The spelling of 25469772240 in words is "twenty-five billion, four hundred sixty-nine million, seven hundred seventy-two thousand, two hundred forty".