13278374525 has 24 divisors (see below), whose sum is σ = 17738630280. Its totient is φ = 9801757440.

The previous prime is 13278374521. The next prime is 13278374533. The reversal of 13278374525 is 52547387231.

It can be written as a sum of positive squares in 12 ways, for example, as 11477051161 + 1801323364 = 107131^2 + 42442^2 .

It is not a de Polignac number, because 13278374525 - 2² = 13278374521 is a prime.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 13278374525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13278374521) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1043099 + ... + 1055751.

It is an arithmetic number, because the mean of its divisors is an integer number (739109595).

Almost surely, 2^13278374525 is an apocalyptic number.

It is an amenable number.

13278374525 is a deficient number, since it is larger than the sum of its proper divisors (4460255755).

13278374525 is a wasteful number, since it uses less digits than its factorization.

13278374525 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15905 (or 15900 counting only the distinct ones).

The product of its digits is 1411200, while the sum is 47.

The spelling of 13278374525 in words is "thirteen billion, two hundred seventy-eight million, three hundred seventy-four thousand, five hundred twenty-five".