13563266643875 has 16 divisors (see below), whose sum is σ = 18229030371552. Its totient is φ = 10015950751200.

The previous prime is 13563266643863. The next prime is 13563266643911. The reversal of 13563266643875 is 57834666236531.

It is not a de Polignac number, because 13563266643875 - 2⁴ = 13563266643859 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4173311189 + ... + 4173314438.

It is an arithmetic number, because the mean of its divisors is an integer number (1139314398222).

Almost surely, 2^{13563266643875} is an apocalyptic number.

13563266643875 is a deficient number, since it is larger than the sum of its proper divisors (4665763727677).

13563266643875 is an equidigital number, since it uses as much as digits as its factorization.

13563266643875 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8346625655 (or 8346625645 counting only the distinct ones).

The product of its digits is 391910400, while the sum is 65.

The spelling of 13563266643875 in words is "thirteen trillion, five hundred sixty-three billion, two hundred sixty-six million, six hundred forty-three thousand, eight hundred seventy-five".