25523545052105 has 16 divisors (see below), whose sum is σ = 32430521122704. Its totient is φ = 19217369487360.

The previous prime is 25523545052081. The next prime is 25523545052107. The reversal of 25523545052105 is 50125054532552.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 6339679408384 + 19183865643721 = 2517872^2 + 4379939^2 .

It is not a de Polignac number, because 25523545052105 - 2²⁶ = 25523477943241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (25523545052107) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1826159 + ... + 7374411.

It is an arithmetic number, because the mean of its divisors is an integer number (2026907570169).

Almost surely, 2^{25523545052105} is an apocalyptic number.

It is an amenable number.

25523545052105 is a deficient number, since it is larger than the sum of its proper divisors (6906976070599).

25523545052105 is a wasteful number, since it uses less digits than its factorization.

25523545052105 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5602396.

The product of its (nonzero) digits is 1500000, while the sum is 44.

Adding to 25523545052105 its reverse (50125054532552), we get a palindrome (75648599584657).

The spelling of 25523545052105 in words is "twenty-five trillion, five hundred twenty-three billion, five hundred forty-five million, fifty-two thousand, one hundred five".