25505550730 has 32 divisors (see below), whose sum is σ = 50932514880. Its totient is φ = 9117544320.

The previous prime is 25505550667. The next prime is 25505550787. The reversal of 25505550730 is 3705550552.

It is a self number, because there is not a number n which added to its sum of digits gives 25505550730.

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 15 ways as a sum of consecutive naturals, for example, 1958499 + ... + 1971478.

It is an arithmetic number, because the mean of its divisors is an integer number (1591641090).

Almost surely, 2^25505550730 is an apocalyptic number.

25505550730 is a deficient number, since it is larger than the sum of its proper divisors (25426964150).

25505550730 is a wasteful number, since it uses less digits than its factorization.

25505550730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3930054.

The product of its (nonzero) digits is 131250, while the sum is 37.

The spelling of 25505550730 in words is "twenty-five billion, five hundred five million, five hundred fifty thousand, seven hundred thirty".