12057558581521 has 8 divisors (see below), whose sum is σ = 12060566634240. Its totient is φ = 12054550792368.

The previous prime is 12057558581489. The next prime is 12057558581539. The reversal of 12057558581521 is 12518585575021.

It is a happy number.

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 12057558581521 - 2⁵ = 12057558581489 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (12057558581021) 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, 115922880 + ... + 116026846.

It is an arithmetic number, because the mean of its divisors is an integer number (1507570829280).

Almost surely, 2^{12057558581521} is an apocalyptic number.

It is an amenable number.

12057558581521 is a deficient number, since it is larger than the sum of its proper divisors (3008052719).

12057558581521 is a wasteful number, since it uses less digits than its factorization.

12057558581521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131783.

The product of its (nonzero) digits is 5600000, while the sum is 55.

The spelling of 12057558581521 in words is "twelve trillion, fifty-seven billion, five hundred fifty-eight million, five hundred eighty-one thousand, five hundred twenty-one".