25642641105 has 12 divisors (see below), whose sum is σ = 44447244660. Its totient is φ = 13676075232.

The previous prime is 25642641043. The next prime is 25642641121. The reversal of 25642641105 is 50114624652.

25642641105 is a `hidden beast` number, since 2 + 5 + 6 + 4 + 2 + 641 + 1 + 0 + 5 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 14509647936 + 11132993169 = 120456^2 + 105513^2 .

It is not a de Polignac number, because 25642641105 - 2²¹ = 25640543953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25642641105.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 284918190 + ... + 284918279.

It is an arithmetic number, because the mean of its divisors is an integer number (3703937055).

Almost surely, 2^25642641105 is an apocalyptic number.

It is an amenable number.

25642641105 is a deficient number, since it is larger than the sum of its proper divisors (18804603555).

25642641105 is a wasteful number, since it uses less digits than its factorization.

25642641105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 569836480 (or 569836477 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 25642641105 in words is "twenty-five billion, six hundred forty-two million, six hundred forty-one thousand, one hundred five".