13776278656 has 48 divisors (see below), whose sum is σ = 31925749590. Its totient is φ = 5904116736.

The previous prime is 13776278653. The next prime is 13776278657. The reversal of 13776278656 is 65687267731.

It can be written as a sum of positive squares in only one way, i.e., 9549198400 + 4227080256 = 97720^2 + 65016^2 .

It is a super-2 number, since 2×13776278656² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13776278656.

It is not an unprimeable number, because it can be changed into a prime (13776278653) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1091965 + ... + 1104508.

Almost surely, 2^13776278656 is an apocalyptic number.

13776278656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

13776278656 is an abundant number, since it is smaller than the sum of its proper divisors (18149470934).

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

13776278656 is an equidigital number, since it uses as much as digits as its factorization.

13776278656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2196501 (or 2196482 counting only the distinct ones).

The product of its digits is 17781120, while the sum is 58.

The spelling of 13776278656 in words is "thirteen billion, seven hundred seventy-six million, two hundred seventy-eight thousand, six hundred fifty-six".