12661544262 has 8 divisors (see below), whose sum is σ = 25323088536. Its totient is φ = 4220514752.

The previous prime is 12661544251. The next prime is 12661544297. The reversal of 12661544262 is 26244516621.

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

12661544262 is an admirable number.

It is a self number, because there is not a number n which added to its sum of digits gives 12661544262.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1055128683 + ... + 1055128694.

It is an arithmetic number, because the mean of its divisors is an integer number (3165386067).

Almost surely, 2^12661544262 is an apocalyptic number.

12661544262 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

12661544262 is a wasteful number, since it uses less digits than its factorization.

12661544262 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110257382.

The product of its digits is 138240, while the sum is 39.

The spelling of 12661544262 in words is "twelve billion, six hundred sixty-one million, five hundred forty-four thousand, two hundred sixty-two".