13088861640 has 48 divisors (see below), whose sum is σ = 42538801500. Its totient is φ = 3490363008.

The previous prime is 13088861627. The next prime is 13088861657. The reversal of 13088861640 is 4616888031.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 13005577764 + 83283876 = 114042^2 + 9126^2 .

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 in 11 ways as a sum of consecutive naturals, for example, 18178615 + ... + 18179334.

Almost surely, 2^13088861640 is an apocalyptic number.

13088861640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13088861640 is an abundant number, since it is smaller than the sum of its proper divisors (29449939860).

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

13088861640 is a wasteful number, since it uses less digits than its factorization.

13088861640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36357966 (or 36357959 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 45.

The spelling of 13088861640 in words is "thirteen billion, eighty-eight million, eight hundred sixty-one thousand, six hundred forty".