25313554540 has 24 divisors (see below), whose sum is σ = 56285433792. Its totient is φ = 9529808640.

The previous prime is 25313554537. The next prime is 25313554543. The reversal of 25313554540 is 4545531352.

It is an interprime number because it is at equal distance from previous prime (25313554537) and next prime (25313554543).

It is a super-2 number, since 2×25313554540² (a number of 22 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 25313554540.

It is not an unprimeable number, because it can be changed into a prime (25313554543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37225476 + ... + 37226155.

It is an arithmetic number, because the mean of its divisors is an integer number (2345226408).

Almost surely, 2^25313554540 is an apocalyptic number.

25313554540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25313554540 is an abundant number, since it is smaller than the sum of its proper divisors (30971879252).

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

25313554540 is a wasteful number, since it uses less digits than its factorization.

25313554540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74451657 (or 74451655 counting only the distinct ones).

The product of its (nonzero) digits is 180000, while the sum is 37.

The spelling of 25313554540 in words is "twenty-five billion, three hundred thirteen million, five hundred fifty-four thousand, five hundred forty".