13778201438125 has 10 divisors (see below), whose sum is σ = 17217240517862. Its totient is φ = 11022561150000.

The previous prime is 13778201438123. The next prime is 13778201438147. The reversal of 13778201438125 is 52183410287731.

It can be written as a sum of positive squares in 5 ways, for example, as 1858017074281 + 11920184363844 = 1363091^2 + 3452562^2 .

It is not a de Polignac number, because 13778201438125 - 2¹ = 13778201438123 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 (13778201438123) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 11022560526 + ... + 11022561775.

Almost surely, 2^{13778201438125} is an apocalyptic number.

It is an amenable number.

13778201438125 is a deficient number, since it is larger than the sum of its proper divisors (3439039079737).

13778201438125 is an frugal number, since it uses more digits than its factorization.

13778201438125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22045122321 (or 22045122306 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 52.

The spelling of 13778201438125 in words is "thirteen trillion, seven hundred seventy-eight billion, two hundred one million, four hundred thirty-eight thousand, one hundred twenty-five".