6443697941136 has 135 divisors (see below), whose sum is σ = 18141546506499. Its totient is φ = 2135095402176.

The previous prime is 6443697941129. The next prime is 6443697941147. The reversal of 6443697941136 is 6311497963446.

The square root of 6443697941136 is 2538444.

It is a perfect power (a square), and thus also a powerful number.

6443697941136 is a `hidden beast` number, since 6 + 443 + 6 + 9 + 79 + 4 + 113 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6061803741 + ... + 6061804803.

Almost surely, 2^{6443697941136} is an apocalyptic number.

6443697941136 is the 2538444-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6443697941136

6443697941136 is an abundant number, since it is smaller than the sum of its proper divisors (11697848565363).

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

6443697941136 is an equidigital number, since it uses as much as digits as its factorization.

6443697941136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538 (or 1267 counting only the distinct ones).

The product of its digits is 70543872, while the sum is 63.

The spelling of 6443697941136 in words is "six trillion, four hundred forty-three billion, six hundred ninety-seven million, nine hundred forty-one thousand, one hundred thirty-six".