25550502555 has 32 divisors (see below), whose sum is σ = 41039451648. Its totient is φ = 13574131200.

The previous prime is 25550502547. The next prime is 25550502569. The reversal of 25550502555 is 55520505552.

It is not a de Polignac number, because 25550502555 - 2³ = 25550502547 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9153210 + ... + 9156000.

It is an arithmetic number, because the mean of its divisors is an integer number (1282482864).

Almost surely, 2^25550502555 is an apocalyptic number.

25550502555 is a deficient number, since it is larger than the sum of its proper divisors (15488949093).

25550502555 is a wasteful number, since it uses less digits than its factorization.

25550502555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4947.

The product of its (nonzero) digits is 312500, while the sum is 39.

The spelling of 25550502555 in words is "twenty-five billion, five hundred fifty million, five hundred two thousand, five hundred fifty-five".