12697213536 has 192 divisors, whose sum is σ = 42905318400. Its totient is φ = 3577955328.

The previous prime is 12697213519. The next prime is 12697213537. The reversal of 12697213536 is 63531279621.

12697213536 is a `hidden beast` number, since 1 + 2 + 6 + 97 + 21 + 3 + 536 = 666.

It is a super-2 number, since 2×12697213536² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12697213491 and 12697213500.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12697213537) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 427125 + ... + 455883.

It is an arithmetic number, because the mean of its divisors is an integer number (223465200).

Almost surely, 2^12697213536 is an apocalyptic number.

12697213536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12697213536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (21452659200).

12697213536 is an abundant number, since it is smaller than the sum of its proper divisors (30208104864).

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

12697213536 is a wasteful number, since it uses less digits than its factorization.

12697213536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28858 (or 28844 counting only the distinct ones).

The product of its digits is 408240, while the sum is 45.

The spelling of 12697213536 in words is "twelve billion, six hundred ninety-seven million, two hundred thirteen thousand, five hundred thirty-six".