64543634536556 has 24 divisors (see below), whose sum is σ = 129104396637216. Its totient is φ = 27657887466240.

The previous prime is 64543634536519. The next prime is 64543634536613. The reversal of 64543634536556 is 65563543634546.

It is a happy number.

It is a super-2 number, since 2×64543634536556² (a number of 28 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (65) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 64543634536492 and 64543634536501.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 152709875 + ... + 153131946.

It is an arithmetic number, because the mean of its divisors is an integer number (5379349859884).

Almost surely, 2^{64543634536556} is an apocalyptic number.

It is an amenable number.

64543634536556 is an abundant number, since it is smaller than the sum of its proper divisors (64560762100660).

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

64543634536556 is a wasteful number, since it uses less digits than its factorization.

64543634536556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 305849369 (or 305849367 counting only the distinct ones).

The product of its digits is 1399680000, while the sum is 65.

The spelling of 64543634536556 in words is "sixty-four trillion, five hundred forty-three billion, six hundred thirty-four million, five hundred thirty-six thousand, five hundred fifty-six".