13378226691 has 8 divisors (see below), whose sum is σ = 17840896704. Its totient is φ = 8917187240.

The previous prime is 13378226681. The next prime is 13378226717. The reversal of 13378226691 is 19662287331.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13378226691 - 2²⁷ = 13244008963 is a prime.

It is a super-3 number, since 3×13378226691³ (a number of 31 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13378226691.

It is not an unprimeable number, because it can be changed into a prime (13378226671) 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, 388365 + ... + 421406.

It is an arithmetic number, because the mean of its divisors is an integer number (2230112088).

Almost surely, 2^13378226691 is an apocalyptic number.

13378226691 is a deficient number, since it is larger than the sum of its proper divisors (4462670013).

13378226691 is an equidigital number, since it uses as much as digits as its factorization.

13378226691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 815281.

The product of its digits is 653184, while the sum is 48.

The spelling of 13378226691 in words is "thirteen billion, three hundred seventy-eight million, two hundred twenty-six thousand, six hundred ninety-one".