12536405663 has 8 divisors (see below), whose sum is σ = 12568048800. Its totient is φ = 12504801888.

The previous prime is 12536405633. The next prime is 12536405671. The reversal of 12536405663 is 36650463521.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12536405663 - 2¹² = 12536401567 is a prime.

It is a super-2 number, since 2×12536405663² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 12536405663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12536405633) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 689078 + ... + 707036.

It is an arithmetic number, because the mean of its divisors is an integer number (1571006100).

Almost surely, 2^12536405663 is an apocalyptic number.

12536405663 is a deficient number, since it is larger than the sum of its proper divisors (31643137).

12536405663 is a wasteful number, since it uses less digits than its factorization.

12536405663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19681.

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 12536405663 in words is "twelve billion, five hundred thirty-six million, four hundred five thousand, six hundred sixty-three".