13642897109 has 8 divisors (see below), whose sum is σ = 13903260120. Its totient is φ = 13382643456.

The previous prime is 13642897087. The next prime is 13642897133. The reversal of 13642897109 is 90179824631.

It can be written as a sum of positive squares in 4 ways, for example, as 10999394884 + 2643502225 = 104878^2 + 51415^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13642897109 - 2²⁴ = 13626119893 is a prime.

It is a super-2 number, since 2×13642897109² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13642887109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 251369 + ... + 300785.

It is an arithmetic number, because the mean of its divisors is an integer number (1737907515).

Almost surely, 2^13642897109 is an apocalyptic number.

It is an amenable number.

13642897109 is a deficient number, since it is larger than the sum of its proper divisors (260363011).

13642897109 is an equidigital number, since it uses as much as digits as its factorization.

13642897109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54679.

The product of its (nonzero) digits is 653184, while the sum is 50.

The spelling of 13642897109 in words is "thirteen billion, six hundred forty-two million, eight hundred ninety-seven thousand, one hundred nine".