13778359843 has 2 divisors, whose sum is σ = 13778359844. Its totient is φ = 13778359842.

The previous prime is 13778359831. The next prime is 13778359873. The reversal of 13778359843 is 34895387731.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 13778359843 - 2¹⁷ = 13778228771 is a prime.

It is not a weakly prime, because it can be changed into another prime (13778359823) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6889179921 + 6889179922.

It is an arithmetic number, because the mean of its divisors is an integer number (6889179922).

Almost surely, 2^13778359843 is an apocalyptic number.

13778359843 is a deficient number, since it is larger than the sum of its proper divisors (1).

13778359843 is an equidigital number, since it uses as much as digits as its factorization.

13778359843 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15240960, while the sum is 58.

The spelling of 13778359843 in words is "thirteen billion, seven hundred seventy-eight million, three hundred fifty-nine thousand, eight hundred forty-three".