13863215779 has 12 divisors (see below), whose sum is σ = 16646812608. Its totient is φ = 11499440400.

The previous prime is 13863215771. The next prime is 13863215789. The reversal of 13863215779 is 97751236831.

It is not a de Polignac number, because 13863215779 - 2³ = 13863215771 is a prime.

It is a super-2 number, since 2×13863215779² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13863215771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4561752 + ... + 4564789.

It is an arithmetic number, because the mean of its divisors is an integer number (1387234384).

Almost surely, 2^13863215779 is an apocalyptic number.

13863215779 is a deficient number, since it is larger than the sum of its proper divisors (2783596829).

13863215779 is an equidigital number, since it uses as much as digits as its factorization.

13863215779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9126586 (or 9126579 counting only the distinct ones).

The product of its digits is 1905120, while the sum is 52.

The spelling of 13863215779 in words is "thirteen billion, eight hundred sixty-three million, two hundred fifteen thousand, seven hundred seventy-nine".