13149535778 has 8 divisors (see below), whose sum is σ = 19782833772. Its totient is φ = 6555257856.

The previous prime is 13149535769. The next prime is 13149535811. The reversal of 13149535778 is 87753594131.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13104067729 + 45468049 = 114473^2 + 6743^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9754175 + ... + 9755522.

Almost surely, 2^13149535778 is an apocalyptic number.

13149535778 is a deficient number, since it is larger than the sum of its proper divisors (6633297994).

13149535778 is a wasteful number, since it uses less digits than its factorization.

13149535778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19510036.

The product of its digits is 3175200, while the sum is 53.

The spelling of 13149535778 in words is "thirteen billion, one hundred forty-nine million, five hundred thirty-five thousand, seven hundred seventy-eight".