25165500550 has 24 divisors (see below), whose sum is σ = 47290395096. Its totient is φ = 9962423040.

The previous prime is 25165500539. The next prime is 25165500583. The reversal of 25165500550 is 5500556152.

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 11 ways as a sum of consecutive naturals, for example, 2589532 + ... + 2599231.

It is an arithmetic number, because the mean of its divisors is an integer number (1970433129).

Almost surely, 2^25165500550 is an apocalyptic number.

25165500550 is a deficient number, since it is larger than the sum of its proper divisors (22124894546).

25165500550 is a wasteful number, since it uses less digits than its factorization.

25165500550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5188872 (or 5188867 counting only the distinct ones).

The product of its (nonzero) digits is 37500, while the sum is 34.

The spelling of 25165500550 in words is "twenty-five billion, one hundred sixty-five million, five hundred thousand, five hundred fifty".