12081574013 has 8 divisors (see below), whose sum is σ = 12129053496. Its totient is φ = 12034137600.

The previous prime is 12081574009. The next prime is 12081574027. The reversal of 12081574013 is 31047518021.

12081574013 = 77722² + 77723².

It can be written as a sum of positive squares in 4 ways, for example, as 3313498969 + 8768075044 = 57563^2 + 93638^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 12081574013 - 2² = 12081574009 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12081573013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 623633 + ... + 642713.

It is an arithmetic number, because the mean of its divisors is an integer number (1516131687).

Almost surely, 2^12081574013 is an apocalyptic number.

12081574013 is the 77723-rd centered square number.

It is an amenable number.

12081574013 is a deficient number, since it is larger than the sum of its proper divisors (47479483).

12081574013 is a wasteful number, since it uses less digits than its factorization.

12081574013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21535.

The product of its (nonzero) digits is 6720, while the sum is 32.

The spelling of 12081574013 in words is "twelve billion, eighty-one million, five hundred seventy-four thousand, thirteen".