25320939550 has 24 divisors (see below), whose sum is σ = 47105502912. Its totient is φ = 10126536000.

The previous prime is 25320939541. The next prime is 25320939599. The reversal of 25320939550 is 5593902352.

It is a happy number.

It is a super-2 number, since 2×25320939550² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 25320939497 and 25320939506.

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, 250995 + ... + 337105.

It is an arithmetic number, because the mean of its divisors is an integer number (1962729288).

Almost surely, 2^25320939550 is an apocalyptic number.

25320939550 is a deficient number, since it is larger than the sum of its proper divisors (21784563362).

25320939550 is a wasteful number, since it uses less digits than its factorization.

25320939550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92004 (or 91999 counting only the distinct ones).

The product of its (nonzero) digits is 364500, while the sum is 43.

The spelling of 25320939550 in words is "twenty-five billion, three hundred twenty million, nine hundred thirty-nine thousand, five hundred fifty".