25130555540 has 12 divisors (see below), whose sum is σ = 52774166676. Its totient is φ = 10052222208.

The previous prime is 25130555519. The next prime is 25130555557. The reversal of 25130555540 is 4555503152.

It can be written as a sum of positive squares in 2 ways, for example, as 11526599044 + 13603956496 = 107362^2 + 116636^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25130555540.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 628263869 + ... + 628263908.

It is an arithmetic number, because the mean of its divisors is an integer number (4397847223).

Almost surely, 2^25130555540 is an apocalyptic number.

25130555540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25130555540 is an abundant number, since it is smaller than the sum of its proper divisors (27643611136).

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

25130555540 is a wasteful number, since it uses less digits than its factorization.

25130555540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1256527786 (or 1256527784 counting only the distinct ones).

The product of its (nonzero) digits is 75000, while the sum is 35.

The spelling of 25130555540 in words is "twenty-five billion, one hundred thirty million, five hundred fifty-five thousand, five hundred forty".