12261813632 has 16 divisors (see below), whose sum is σ = 24427832100. Its totient is φ = 6130906752.

The previous prime is 12261813631. The next prime is 12261813667. The reversal of 12261813632 is 23631816221.

12261813632 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (16).

It is a junction number, because it is equal to n+sod(n) for n = 12261813592 and 12261813601.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12261813631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 47897582 + ... + 47897837.

Almost surely, 2^12261813632 is an apocalyptic number.

It is an amenable number.

12261813632 is a deficient number, since it is larger than the sum of its proper divisors (12166018468).

12261813632 is an frugal number, since it uses more digits than its factorization.

12261813632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 95795433 (or 95795421 counting only the distinct ones).

The product of its digits is 20736, while the sum is 35.

The spelling of 12261813632 in words is "twelve billion, two hundred sixty-one million, eight hundred thirteen thousand, six hundred thirty-two".