12653555646 has 16 divisors (see below), whose sum is σ = 25420598784. Its totient is φ = 4198937304.

The previous prime is 12653555597. The next prime is 12653555653. The reversal of 12653555646 is 64655535621.

It is a super-2 number, since 2×12653555646² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 12653555595 and 12653555604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4727196 + ... + 4729871.

It is an arithmetic number, because the mean of its divisors is an integer number (1588787424).

Almost surely, 2^12653555646 is an apocalyptic number.

12653555646 is an abundant number, since it is smaller than the sum of its proper divisors (12767043138).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12653555646 is a wasteful number, since it uses less digits than its factorization.

12653555646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9457295.

The product of its digits is 3240000, while the sum is 48.

The spelling of 12653555646 in words is "twelve billion, six hundred fifty-three million, five hundred fifty-five thousand, six hundred forty-six".