25505027505 has 24 divisors (see below), whose sum is σ = 44933452200. Its totient is φ = 13379685120.

The previous prime is 25505027491. The next prime is 25505027519. The reversal of 25505027505 is 50572050552.

25505027505 is a `hidden beast` number, since 2 + 550 + 50 + 2 + 7 + 50 + 5 = 666.

It is an interprime number because it is at equal distance from previous prime (25505027491) and next prime (25505027519).

It can be written as a sum of positive squares in 4 ways, for example, as 706336929 + 24798690576 = 26577^2 + 157476^2 .

It is not a de Polignac number, because 25505027505 - 2¹¹ = 25505025457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25505027505.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4642980 + ... + 4648469.

It is an arithmetic number, because the mean of its divisors is an integer number (1872227175).

Almost surely, 2^25505027505 is an apocalyptic number.

It is an amenable number.

25505027505 is a deficient number, since it is larger than the sum of its proper divisors (19428424695).

25505027505 is a wasteful number, since it uses less digits than its factorization.

25505027505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9291521 (or 9291518 counting only the distinct ones).

The product of its (nonzero) digits is 87500, while the sum is 36.

The spelling of 25505027505 in words is "twenty-five billion, five hundred five million, twenty-seven thousand, five hundred five".