25605645514 has 16 divisors (see below), whose sum is σ = 40964642568. Its totient is φ = 11961759232.

The previous prime is 25605645509. The next prime is 25605645539. The reversal of 25605645514 is 41554650652.

It can be written as a sum of positive squares in 4 ways, for example, as 18094823289 + 7510822225 = 134517^2 + 86665^2 .

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 7 ways as a sum of consecutive naturals, for example, 2743909 + ... + 2753224.

Almost surely, 2^25605645514 is an apocalyptic number.

25605645514 is a deficient number, since it is larger than the sum of its proper divisors (15358997054).

25605645514 is a wasteful number, since it uses less digits than its factorization.

25605645514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5497289.

The product of its (nonzero) digits is 720000, while the sum is 43.

The spelling of 25605645514 in words is "twenty-five billion, six hundred five million, six hundred forty-five thousand, five hundred fourteen".