12661302532 has 24 divisors (see below), whose sum is σ = 22585288320. Its totient is φ = 6208862880.

The previous prime is 12661302529. The next prime is 12661302541. The reversal of 12661302532 is 23520316621.

It is a happy number.

It is a super-2 number, since 2×12661302532² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12661302494 and 12661302503.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 39478 + ... + 163954.

It is an arithmetic number, because the mean of its divisors is an integer number (941053680).

Almost surely, 2^12661302532 is an apocalyptic number.

It is an amenable number.

12661302532 is a deficient number, since it is larger than the sum of its proper divisors (9923985788).

12661302532 is a wasteful number, since it uses less digits than its factorization.

12661302532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 124971 (or 124969 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The spelling of 12661302532 in words is "twelve billion, six hundred sixty-one million, three hundred two thousand, five hundred thirty-two".