13491782530 has 8 divisors (see below), whose sum is σ = 24285208572. Its totient is φ = 5396713008.

The previous prime is 13491782519. The next prime is 13491782533. The reversal of 13491782530 is 3528719431.

It can be written as a sum of positive squares in 2 ways, for example, as 12597593121 + 894189409 = 112239^2 + 29903^2 .

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

It is not an unprimeable number, because it can be changed into a prime (13491782533) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 674589117 + ... + 674589136.

Almost surely, 2^13491782530 is an apocalyptic number.

13491782530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13491782530 is a deficient number, since it is larger than the sum of its proper divisors (10793426042).

13491782530 is a wasteful number, since it uses less digits than its factorization.

13491782530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349178260.

The product of its (nonzero) digits is 181440, while the sum is 43.

The spelling of 13491782530 in words is "thirteen billion, four hundred ninety-one million, seven hundred eighty-two thousand, five hundred thirty".