25857631105 has 16 divisors (see below), whose sum is σ = 31099418064. Its totient is φ = 20639324160.

The previous prime is 25857631103. The next prime is 25857631127. The reversal of 25857631105 is 50113675852.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 3991206976 + 21866424129 = 63176^2 + 147873^2 .

It is not a de Polignac number, because 25857631105 - 2¹ = 25857631103 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25857631103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4680745 + ... + 4686265.

It is an arithmetic number, because the mean of its divisors is an integer number (1943713629).

Almost surely, 2^25857631105 is an apocalyptic number.

It is an amenable number.

25857631105 is a deficient number, since it is larger than the sum of its proper divisors (5241786959).

25857631105 is a wasteful number, since it uses less digits than its factorization.

25857631105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7476.

The product of its (nonzero) digits is 252000, while the sum is 43.

The spelling of 25857631105 in words is "twenty-five billion, eight hundred fifty-seven million, six hundred thirty-one thousand, one hundred five".