6445846539993 has 128 divisors (see below), whose sum is σ = 10933926912000. Its totient is φ = 3291057487872.

The previous prime is 6445846539973. The next prime is 6445846540031. The reversal of 6445846539993 is 3999356485446.

It is not a de Polignac number, because 6445846539993 - 2⁶ = 6445846539929 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6445846539973) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 711536098 + ... + 711545156.

It is an arithmetic number, because the mean of its divisors is an integer number (85421304000).

Almost surely, 2^{6445846539993} is an apocalyptic number.

It is an amenable number.

6445846539993 is a deficient number, since it is larger than the sum of its proper divisors (4488080372007).

6445846539993 is a wasteful number, since it uses less digits than its factorization.

6445846539993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9751.

The product of its digits is 3023308800, while the sum is 75.

The spelling of 6445846539993 in words is "six trillion, four hundred forty-five billion, eight hundred forty-six million, five hundred thirty-nine thousand, nine hundred ninety-three".