13564940525 has 6 divisors (see below), whose sum is σ = 16820526282. Its totient is φ = 10851952400.

The previous prime is 13564940507. The next prime is 13564940527. The reversal of 13564940525 is 52504946531.

It can be written as a sum of positive squares in 3 ways, for example, as 1139602564 + 12425337961 = 33758^2 + 111469^2 .

It is not a de Polignac number, because 13564940525 - 2¹⁰ = 13564939501 is a prime.

It is a super-2 number, since 2×13564940525² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13564940527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 271298786 + ... + 271298835.

It is an arithmetic number, because the mean of its divisors is an integer number (2803421047).

Almost surely, 2^13564940525 is an apocalyptic number.

It is an amenable number.

13564940525 is a deficient number, since it is larger than the sum of its proper divisors (3255585757).

13564940525 is an equidigital number, since it uses as much as digits as its factorization.

13564940525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542597631 (or 542597626 counting only the distinct ones).

The product of its (nonzero) digits is 648000, while the sum is 44.

The spelling of 13564940525 in words is "thirteen billion, five hundred sixty-four million, nine hundred forty thousand, five hundred twenty-five".