13888891648 has 36 divisors (see below), whose sum is σ = 27876791488. Its totient is φ = 6906055680.

The previous prime is 13888891633. The next prime is 13888891657. The reversal of 13888891648 is 84619888831.

It is a happy number.

It is a super-2 number, since 2×13888891648² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (64).

It is a self number, because there is not a number n which added to its sum of digits gives 13888891648.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 103536 + ... + 196207.

Almost surely, 2^13888891648 is an apocalyptic number.

It is an amenable number.

13888891648 is an abundant number, since it is smaller than the sum of its proper divisors (13987899840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13888891648 is an equidigital number, since it uses as much as digits as its factorization.

13888891648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299940 (or 299926 counting only the distinct ones).

The product of its digits is 21233664, while the sum is 64.

The spelling of 13888891648 in words is "thirteen billion, eight hundred eighty-eight million, eight hundred ninety-one thousand, six hundred forty-eight".