13554278777768 has 8 divisors (see below), whose sum is σ = 25414272708330. Its totient is φ = 6777139388880.

The previous prime is 13554278777761. The next prime is 13554278777791. The reversal of 13554278777768 is 86777787245531.

It can be written as a sum of positive squares in only one way, i.e., 12740887635844 + 813391141924 = 3569438^2 + 901882^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (13554278777761) by changing a digit.

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 as a sum of consecutive naturals, namely, 847142423603 + ... + 847142423618.

Almost surely, 2^{13554278777768} is an apocalyptic number.

It is an amenable number.

13554278777768 is a deficient number, since it is larger than the sum of its proper divisors (11859993930562).

13554278777768 is a wasteful number, since it uses less digits than its factorization.

13554278777768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1694284847227 (or 1694284847223 counting only the distinct ones).

The product of its digits is 3872332800, while the sum is 77.

The spelling of 13554278777768 in words is "thirteen trillion, five hundred fifty-four billion, two hundred seventy-eight million, seven hundred seventy-seven thousand, seven hundred sixty-eight".