13253979765689 has 4 divisors (see below), whose sum is σ = 14273516670756. Its totient is φ = 12234442860624.

The previous prime is 13253979765661. The next prime is 13253979765713. The reversal of 13253979765689 is 98656797935231.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1246645940089 + 12007333825600 = 1116533^2 + 3465160^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13253979765689 is a prime.

It is a super-3 number, since 3×13253979765689³ (a number of 40 digits) contains 333 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (13253979765289) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 509768452514 + ... + 509768452539.

It is an arithmetic number, because the mean of its divisors is an integer number (3568379167689).

Almost surely, 2^{13253979765689} is an apocalyptic number.

It is an amenable number.

13253979765689 is a deficient number, since it is larger than the sum of its proper divisors (1019536905067).

13253979765689 is a wasteful number, since it uses less digits than its factorization.

13253979765689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1019536905066.

The product of its digits is 4629441600, while the sum is 80.

The spelling of 13253979765689 in words is "thirteen trillion, two hundred fifty-three billion, nine hundred seventy-nine million, seven hundred sixty-five thousand, six hundred eighty-nine".