13621870863 has 12 divisors (see below), whose sum is σ = 19793858448. Its totient is φ = 9026867520.

The previous prime is 13621870861. The next prime is 13621870877. The reversal of 13621870863 is 36807812631.

13621870863 is a `hidden beast` number, since 13 + 621 + 8 + 7 + 0 + 8 + 6 + 3 = 666.

It is not a de Polignac number, because 13621870863 - 2¹ = 13621870861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13621870861) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4530058 + ... + 4533063.

It is an arithmetic number, because the mean of its divisors is an integer number (1649488204).

Almost surely, 2^13621870863 is an apocalyptic number.

13621870863 is a deficient number, since it is larger than the sum of its proper divisors (6171987585).

13621870863 is a wasteful number, since it uses less digits than its factorization.

13621870863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9063294 (or 9063291 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 45.

The spelling of 13621870863 in words is "thirteen billion, six hundred twenty-one million, eight hundred seventy thousand, eight hundred sixty-three".