12261372664 has 16 divisors (see below), whose sum is σ = 22991258520. Its totient is φ = 6130370400.

The previous prime is 12261372551. The next prime is 12261372679. The reversal of 12261372664 is 46627316221.

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, 252067 + ... + 296749.

Almost surely, 2^12261372664 is an apocalyptic number.

It is an amenable number.

12261372664 is a deficient number, since it is larger than the sum of its proper divisors (10729885856).

12261372664 is a wasteful number, since it uses less digits than its factorization.

12261372664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78990 (or 78986 counting only the distinct ones).

The product of its digits is 145152, while the sum is 40.

Adding to 12261372664 its reverse (46627316221), we get a palindrome (58888688885).

The spelling of 12261372664 in words is "twelve billion, two hundred sixty-one million, three hundred seventy-two thousand, six hundred sixty-four".