12615649336816 has 10 divisors (see below), whose sum is σ = 24442820590112. Its totient is φ = 6307824668400.

The previous prime is 12615649336811. The next prime is 12615649336847. The reversal of 12615649336816 is 61863394651621.

It is a super-2 number, since 2×12615649336816² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12615649336811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 394239041760 + ... + 394239041791.

Almost surely, 2^{12615649336816} is an apocalyptic number.

12615649336816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

12615649336816 is a deficient number, since it is larger than the sum of its proper divisors (11827171253296).

12615649336816 is an equidigital number, since it uses as much as digits as its factorization.

12615649336816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788478083559 (or 788478083553 counting only the distinct ones).

The product of its digits is 33592320, while the sum is 61.

The spelling of 12615649336816 in words is "twelve trillion, six hundred fifteen billion, six hundred forty-nine million, three hundred thirty-six thousand, eight hundred sixteen".