12327261816 has 64 divisors (see below), whose sum is σ = 32643453600. Its totient is φ = 3865899008.

The previous prime is 12327261803. The next prime is 12327261829. The reversal of 12327261816 is 61816272321.

It is an interprime number because it is at equal distance from previous prime (12327261803) and next prime (12327261829).

It is a super-2 number, since 2×12327261816² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1633540 + ... + 1641068.

Almost surely, 2^12327261816 is an apocalyptic number.

It is an amenable number.

12327261816 is an abundant number, since it is smaller than the sum of its proper divisors (20316191784).

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

12327261816 is a wasteful number, since it uses less digits than its factorization.

12327261816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11568 (or 11564 counting only the distinct ones).

The product of its digits is 48384, while the sum is 39.

The spelling of 12327261816 in words is "twelve billion, three hundred twenty-seven million, two hundred sixty-one thousand, eight hundred sixteen".