12646536771553 has 8 divisors (see below), whose sum is σ = 12655248984000. Its totient is φ = 12637824929520.

The previous prime is 12646536771521. The next prime is 12646536771581. The reversal of 12646536771553 is 35517763564621.

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 12646536771553 - 2⁵ = 12646536771521 is a prime.

It is a super-2 number, since 2×12646536771553² (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 = 12646536771491 and 12646536771500.

It is not an unprimeable number, because it can be changed into a prime (12646536775553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 136574076 + ... + 136666642.

It is an arithmetic number, because the mean of its divisors is an integer number (1581906123000).

Almost surely, 2^{12646536771553} is an apocalyptic number.

It is an amenable number.

12646536771553 is a deficient number, since it is larger than the sum of its proper divisors (8712212447).

12646536771553 is an equidigital number, since it uses as much as digits as its factorization.

12646536771553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 185207.

The product of its digits is 95256000, while the sum is 61.

The spelling of 12646536771553 in words is "twelve trillion, six hundred forty-six billion, five hundred thirty-six million, seven hundred seventy-one thousand, five hundred fifty-three".