25500502555 has 16 divisors (see below), whose sum is σ = 33658373088. Its totient is φ = 18545815200.

The previous prime is 25500502541. The next prime is 25500502591. The reversal of 25500502555 is 55520500552.

It is not a de Polignac number, because 25500502555 - 2¹⁹ = 25499978267 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 25500502555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1909236 + ... + 1922545.

It is an arithmetic number, because the mean of its divisors is an integer number (2103648318).

Almost surely, 2^25500502555 is an apocalyptic number.

25500502555 is a deficient number, since it is larger than the sum of its proper divisors (8157870533).

25500502555 is an equidigital number, since it uses as much as digits as its factorization.

25500502555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3831819 (or 3831797 counting only the distinct ones).

The product of its (nonzero) digits is 62500, while the sum is 34.

The spelling of 25500502555 in words is "twenty-five billion, five hundred million, five hundred two thousand, five hundred fifty-five".