13863578657 has 4 divisors (see below), whose sum is σ = 13873618836. Its totient is φ = 13853538480.

The previous prime is 13863578633. The next prime is 13863578669. The reversal of 13863578657 is 75687536831.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 75687536831 = 2953 ⋅25630727.

It can be written as a sum of positive squares in 2 ways, for example, as 3302111296 + 10561467361 = 57464^2 + 102769^2 .

It is a cyclic number.

It is not a de Polignac number, because 13863578657 - 2⁶ = 13863578593 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13863578596 and 13863578605.

It is not an unprimeable number, because it can be changed into a prime (13863578257) 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, 5018018 + ... + 5020779.

It is an arithmetic number, because the mean of its divisors is an integer number (3468404709).

Almost surely, 2^13863578657 is an apocalyptic number.

It is an amenable number.

13863578657 is a deficient number, since it is larger than the sum of its proper divisors (10040179).

13863578657 is a wasteful number, since it uses less digits than its factorization.

13863578657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10040178.

The product of its digits is 25401600, while the sum is 59.

The spelling of 13863578657 in words is "thirteen billion, eight hundred sixty-three million, five hundred seventy-eight thousand, six hundred fifty-seven".