11647115828 has 12 divisors (see below), whose sum is σ = 20531230692. Its totient is φ = 5781049920.

The previous prime is 11647115827. The next prime is 11647115833. The reversal of 11647115828 is 82851174611.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 9512491024 + 2134624804 = 97532^2 + 46202^2 .

It is a super-2 number, since 2×11647115828² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11647115827) 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, 10626383 + ... + 10627478.

It is an arithmetic number, because the mean of its divisors is an integer number (1710935891).

Almost surely, 2^11647115828 is an apocalyptic number.

It is an amenable number.

11647115828 is a deficient number, since it is larger than the sum of its proper divisors (8884114864).

11647115828 is a wasteful number, since it uses less digits than its factorization.

11647115828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21254002 (or 21254000 counting only the distinct ones).

The product of its digits is 107520, while the sum is 44.

The spelling of 11647115828 in words is "eleven billion, six hundred forty-seven million, one hundred fifteen thousand, eight hundred twenty-eight".