13982563646 has 4 divisors (see below), whose sum is σ = 20973845472. Its totient is φ = 6991281822.

The previous prime is 13982563603. The next prime is 13982563649. The reversal of 13982563646 is 64636528931.

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

It is a super-2 number, since 2×13982563646² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13982563649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3495640910 + ... + 3495640913.

It is an arithmetic number, because the mean of its divisors is an integer number (5243461368).

Almost surely, 2^13982563646 is an apocalyptic number.

13982563646 is a deficient number, since it is larger than the sum of its proper divisors (6991281826).

13982563646 is an equidigital number, since it uses as much as digits as its factorization.

13982563646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6991281825.

The product of its digits is 5598720, while the sum is 53.

The spelling of 13982563646 in words is "thirteen billion, nine hundred eighty-two million, five hundred sixty-three thousand, six hundred forty-six".