12520055045405 has 8 divisors (see below), whose sum is σ = 15248305846752. Its totient is φ = 9866550841488.

The previous prime is 12520055045401. The next prime is 12520055045413. The reversal of 12520055045405 is 50454055002521.

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 12520055045405 - 2² = 12520055045401 is a prime.

It is a super-2 number, since 2×12520055045405² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12520055045401) 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, 18686648987 + ... + 18686649656.

It is an arithmetic number, because the mean of its divisors is an integer number (1906038230844).

Almost surely, 2^{12520055045405} is an apocalyptic number.

It is an amenable number.

12520055045405 is a deficient number, since it is larger than the sum of its proper divisors (2728250801347).

12520055045405 is an equidigital number, since it uses as much as digits as its factorization.

12520055045405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37373298715.

The product of its (nonzero) digits is 200000, while the sum is 38.

The spelling of 12520055045405 in words is "twelve trillion, five hundred twenty billion, fifty-five million, forty-five thousand, four hundred five".