12663615534 has 16 divisors (see below), whose sum is σ = 25409733888. Its totient is φ = 4207454712.

The previous prime is 12663615493. The next prime is 12663615611. The reversal of 12663615534 is 43551636621.

It is a super-2 number, since 2×12663615534² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3435622 + ... + 3439305.

It is an arithmetic number, because the mean of its divisors is an integer number (1588108368).

Almost surely, 2^12663615534 is an apocalyptic number.

12663615534 is an abundant number, since it is smaller than the sum of its proper divisors (12746118354).

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

12663615534 is a wasteful number, since it uses less digits than its factorization.

12663615534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6875239.

The product of its digits is 388800, while the sum is 42.

The spelling of 12663615534 in words is "twelve billion, six hundred sixty-three million, six hundred fifteen thousand, five hundred thirty-four".