13771491904 has 21 divisors (see below), whose sum is σ = 27329667337. Its totient is φ = 6885276544.

The previous prime is 13771491901. The next prime is 13771491919. The reversal of 13771491904 is 40919417731.

The square root of 13771491904 is 117352.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 8882685504 + 4888806400 = 94248^2 + 69920^2 .

It is a super-3 number, since 3×13771491904³ (a number of 31 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13771491901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 931482 + ... + 946150.

Almost surely, 2^13771491904 is an apocalyptic number.

13771491904 is the 117352-nd square number.

It is an amenable number.

13771491904 is a deficient number, since it is larger than the sum of its proper divisors (13558175433).

13771491904 is an frugal number, since it uses more digits than its factorization.

13771491904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29350 (or 14671 counting only the distinct ones).

The product of its (nonzero) digits is 190512, while the sum is 46.

The spelling of 13771491904 in words is "thirteen billion, seven hundred seventy-one million, four hundred ninety-one thousand, nine hundred four".