25550326563 has 16 divisors (see below), whose sum is σ = 34868397696. Its totient is φ = 16633108800.

The previous prime is 25550326553. The next prime is 25550326609. The reversal of 25550326563 is 36562305552.

It is not a de Polignac number, because 25550326563 - 2¹³ = 25550318371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (25550326523) by changing a digit.

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, 518356 + ... + 565502.

It is an arithmetic number, because the mean of its divisors is an integer number (2179274856).

Almost surely, 2^25550326563 is an apocalyptic number.

25550326563 is a deficient number, since it is larger than the sum of its proper divisors (9318071133).

25550326563 is a wasteful number, since it uses less digits than its factorization.

25550326563 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51394.

The product of its (nonzero) digits is 810000, while the sum is 42.

The spelling of 25550326563 in words is "twenty-five billion, five hundred fifty million, three hundred twenty-six thousand, five hundred sixty-three".