13897445769 has 6 divisors (see below), whose sum is σ = 20074088346. Its totient is φ = 9264963840.

The previous prime is 13897445761. The next prime is 13897445803. The reversal of 13897445769 is 96754479831.

13897445769 is a `hidden beast` number, since 1 + 38 + 97 + 4 + 457 + 69 = 666.

It can be written as a sum of positive squares in only one way, i.e., 9670755600 + 4226690169 = 98340^2 + 65013^2 .

It is not a de Polignac number, because 13897445769 - 2³ = 13897445761 is a prime.

It is a super-2 number, since 2×13897445769² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13897445761) 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, 772080312 + ... + 772080329.

It is an arithmetic number, because the mean of its divisors is an integer number (3345681391).

Almost surely, 2^13897445769 is an apocalyptic number.

It is an amenable number.

13897445769 is a deficient number, since it is larger than the sum of its proper divisors (6176642577).

13897445769 is a wasteful number, since it uses less digits than its factorization.

13897445769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1544160647 (or 1544160644 counting only the distinct ones).

The product of its digits is 45722880, while the sum is 63.

The spelling of 13897445769 in words is "thirteen billion, eight hundred ninety-seven million, four hundred forty-five thousand, seven hundred sixty-nine".