6443216536455 has 24 divisors (see below), whose sum is σ = 11224363831200. Its totient is φ = 3419113896000.

The previous prime is 6443216536441. The next prime is 6443216536457. The reversal of 6443216536455 is 5546356123446.

6443216536455 is a `hidden beast` number, since 6 + 4 + 43 + 2 + 16 + 536 + 4 + 55 = 666.

It is not a de Polignac number, because 6443216536455 - 2⁵ = 6443216536423 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6443216536457) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 359746296 + ... + 359764205.

It is an arithmetic number, because the mean of its divisors is an integer number (467681826300).

Almost surely, 2^{6443216536455} is an apocalyptic number.

6443216536455 is a deficient number, since it is larger than the sum of its proper divisors (4781147294745).

6443216536455 is a wasteful number, since it uses less digits than its factorization.

6443216536455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 719510711 (or 719510708 counting only the distinct ones).

The product of its digits is 31104000, while the sum is 54.

The spelling of 6443216536455 in words is "six trillion, four hundred forty-three billion, two hundred sixteen million, five hundred thirty-six thousand, four hundred fifty-five".