13781178883256 has 32 divisors (see below), whose sum is σ = 27361456922880. Its totient is φ = 6484842624000.

The previous prime is 13781178883253. The next prime is 13781178883261. The reversal of 13781178883256 is 65238887118731.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (68).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13781178883253) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1143125 + ... + 5372996.

It is an arithmetic number, because the mean of its divisors is an integer number (855045528840).

Almost surely, 2^{13781178883256} is an apocalyptic number.

It is an amenable number.

13781178883256 is a deficient number, since it is larger than the sum of its proper divisors (13580278039624).

13781178883256 is a wasteful number, since it uses less digits than its factorization.

13781178883256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6531695 (or 6531691 counting only the distinct ones).

The product of its digits is 108380160, while the sum is 68.

The spelling of 13781178883256 in words is "thirteen trillion, seven hundred eighty-one billion, one hundred seventy-eight million, eight hundred eighty-three thousand, two hundred fifty-six".