12661302534 has 32 divisors (see below), whose sum is σ = 27677085696. Its totient is φ = 3844037760.

The previous prime is 12661302529. The next prime is 12661302541. The reversal of 12661302534 is 43520316621.

It is a junction number, because it is equal to n+sod(n) for n = 12661302495 and 12661302504.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1998942 + ... + 2005265.

It is an arithmetic number, because the mean of its divisors is an integer number (864908928).

Almost surely, 2^12661302534 is an apocalyptic number.

12661302534 is an abundant number, since it is smaller than the sum of its proper divisors (15015783162).

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

12661302534 is a wasteful number, since it uses less digits than its factorization.

12661302534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4004260.

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 12661302534 in words is "twelve billion, six hundred sixty-one million, three hundred two thousand, five hundred thirty-four".