10531986539 has 4 divisors (see below), whose sum is σ = 11086301640. Its totient is φ = 9977671440.

The previous prime is 10531986533. The next prime is 10531986571. The reversal of 10531986539 is 93568913501.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10531986539 is a prime.

It is a super-2 number, since 2×10531986539² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (10531986533) 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, 277157522 + ... + 277157559.

It is an arithmetic number, because the mean of its divisors is an integer number (2771575410).

Almost surely, 2^10531986539 is an apocalyptic number.

10531986539 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

10531986539 is a deficient number, since it is larger than the sum of its proper divisors (554315101).

10531986539 is an equidigital number, since it uses as much as digits as its factorization.

10531986539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 554315100.

The product of its (nonzero) digits is 874800, while the sum is 50.

The spelling of 10531986539 in words is "ten billion, five hundred thirty-one million, nine hundred eighty-six thousand, five hundred thirty-nine".