25225215278340 has 144 divisors (see below), whose sum is σ = 88726046645376. Its totient is φ = 5241603164160.

The previous prime is 25225215278317. The next prime is 25225215278357. The reversal of 25225215278340 is 4387251252252.

It is a super-2 number, since 2×25225215278340² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25225215278340.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 248131149 + ... + 248232788.

It is an arithmetic number, because the mean of its divisors is an integer number (616153101704).

Almost surely, 2^{25225215278340} is an apocalyptic number.

25225215278340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25225215278340 is an abundant number, since it is smaller than the sum of its proper divisors (63500831367036).

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

25225215278340 is a wasteful number, since it uses less digits than its factorization.

25225215278340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 496363978 (or 496363965 counting only the distinct ones).

The product of its (nonzero) digits is 2688000, while the sum is 48.

The spelling of 25225215278340 in words is "twenty-five trillion, two hundred twenty-five billion, two hundred fifteen million, two hundred seventy-eight thousand, three hundred forty".