12690636384 has 24 divisors (see below), whose sum is σ = 33312920760. Its totient is φ = 4230212096.

The previous prime is 12690636341. The next prime is 12690636407. The reversal of 12690636384 is 48363609621.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×12690636384² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

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 3 ways as a sum of consecutive naturals, for example, 66096969 + ... + 66097160.

It is an arithmetic number, because the mean of its divisors is an integer number (1388038365).

Almost surely, 2^12690636384 is an apocalyptic number.

It is an amenable number.

12690636384 is an abundant number, since it is smaller than the sum of its proper divisors (20622284376).

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

12690636384 is a wasteful number, since it uses less digits than its factorization.

12690636384 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132194142 (or 132194134 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 48.

The spelling of 12690636384 in words is "twelve billion, six hundred ninety million, six hundred thirty-six thousand, three hundred eighty-four".