13887637525 has 6 divisors (see below), whose sum is σ = 17220670562. Its totient is φ = 11110110000.

The previous prime is 13887637523. The next prime is 13887637531. The reversal of 13887637525 is 52573678831.

It can be written as a sum of positive squares in 3 ways, for example, as 964040401 + 12923597124 = 31049^2 + 113682^2 .

It is not a de Polignac number, because 13887637525 - 2¹ = 13887637523 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13887637523) 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, 277752726 + ... + 277752775.

Almost surely, 2^13887637525 is an apocalyptic number.

It is an amenable number.

13887637525 is a deficient number, since it is larger than the sum of its proper divisors (3333033037).

13887637525 is an equidigital number, since it uses as much as digits as its factorization.

13887637525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 555505511 (or 555505506 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 55.

The spelling of 13887637525 in words is "thirteen billion, eight hundred eighty-seven million, six hundred thirty-seven thousand, five hundred twenty-five".