13149693508 has 72 divisors (see below), whose sum is σ = 28208150880. Its totient is φ = 5333247360.

The previous prime is 13149693437. The next prime is 13149693509. The reversal of 13149693508 is 80539694131.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is not an unprimeable number, because it can be changed into a prime (13149693509) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6169603 + ... + 6171733.

Almost surely, 2^13149693508 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13149693508, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14104075440).

13149693508 is an abundant number, since it is smaller than the sum of its proper divisors (15058457372).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13149693508 is a wasteful number, since it uses less digits than its factorization.

13149693508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825 (or 3816 counting only the distinct ones).

The product of its (nonzero) digits is 699840, while the sum is 49.

The spelling of 13149693508 in words is "thirteen billion, one hundred forty-nine million, six hundred ninety-three thousand, five hundred eight".