13778359873 has 2 divisors, whose sum is σ = 13778359874. Its totient is φ = 13778359872.

The previous prime is 13778359843. The next prime is 13778359879. The reversal of 13778359873 is 37895387731.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11746874689 + 2031485184 = 108383^2 + 45072^2 .

It is an emirp because it is prime and its reverse (37895387731) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13778359873 is a prime.

It is a super-2 number, since 2×13778359873² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (13778359879) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6889179936 + 6889179937.

It is an arithmetic number, because the mean of its divisors is an integer number (6889179937).

Almost surely, 2^13778359873 is an apocalyptic number.

It is an amenable number.

13778359873 is a deficient number, since it is larger than the sum of its proper divisors (1).

13778359873 is an equidigital number, since it uses as much as digits as its factorization.

13778359873 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26671680, while the sum is 61.

The spelling of 13778359873 in words is "thirteen billion, seven hundred seventy-eight million, three hundred fifty-nine thousand, eight hundred seventy-three".