6453681239869 has 8 divisors (see below), whose sum is σ = 6611121426168. Its totient is φ = 6296242640640.

The previous prime is 6453681239851. The next prime is 6453681239917. The reversal of 6453681239869 is 9689321863546.

It can be written as a sum of positive squares in 4 ways, for example, as 92818934244 + 6360862305625 = 304662^2 + 2522075^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6453681239869 is a prime.

It is a super-2 number, since 2×6453681239869² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6453681239798 and 6453681239807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6453687239869) 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, 16020529 + ... + 16418425.

It is an arithmetic number, because the mean of its divisors is an integer number (826390178271).

Almost surely, 2^{6453681239869} is an apocalyptic number.

It is an amenable number.

6453681239869 is a deficient number, since it is larger than the sum of its proper divisors (157440186299).

6453681239869 is a wasteful number, since it uses less digits than its factorization.

6453681239869 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793535.

The product of its digits is 403107840, while the sum is 70.

The spelling of 6453681239869 in words is "six trillion, four hundred fifty-three billion, six hundred eighty-one million, two hundred thirty-nine thousand, eight hundred sixty-nine".