12554526356561 has 8 divisors (see below), whose sum is σ = 14355391876800. Its totient is φ = 10755501275088.

The previous prime is 12554526356557. The next prime is 12554526356591. The reversal of 12554526356561 is 16565362545521.

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 12554526356561 - 2² = 12554526356557 is a prime.

It is a super-2 number, since 2×12554526356561² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 12554526356497 and 12554526356506.

It is not an unprimeable number, because it can be changed into a prime (12554526356591) 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, 460095071 + ... + 460122356.

It is an arithmetic number, because the mean of its divisors is an integer number (1794423984600).

Almost surely, 2^{12554526356561} is an apocalyptic number.

It is an amenable number.

12554526356561 is a deficient number, since it is larger than the sum of its proper divisors (1800865520239).

12554526356561 is an equidigital number, since it uses as much as digits as its factorization.

12554526356561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920219383.

The product of its digits is 32400000, while the sum is 56.

The spelling of 12554526356561 in words is "twelve trillion, five hundred fifty-four billion, five hundred twenty-six million, three hundred fifty-six thousand, five hundred sixty-one".