13454852656778 has 12 divisors (see below), whose sum is σ = 21854183753718. Its totient is φ = 6209931995280.

The previous prime is 13454852656757. The next prime is 13454852656783. The reversal of 13454852656778 is 87765625845431.

It can be written as a sum of positive squares in 3 ways, for example, as 10588275205369 + 2866577451409 = 3253963^2 + 1693097^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19903627853 + ... + 19903628528.

Almost surely, 2^{13454852656778} is an apocalyptic number.

13454852656778 is a deficient number, since it is larger than the sum of its proper divisors (8399331096940).

13454852656778 is a wasteful number, since it uses less digits than its factorization.

13454852656778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39807256409 (or 39807256396 counting only the distinct ones).

The product of its digits is 1354752000, while the sum is 71.

The spelling of 13454852656778 in words is "thirteen trillion, four hundred fifty-four billion, eight hundred fifty-two million, six hundred fifty-six thousand, seven hundred seventy-eight".