6445989741831 has 8 divisors (see below), whose sum is σ = 8891020333680. Its totient is φ = 4149142822272.

The previous prime is 6445989741809. The next prime is 6445989741859. The reversal of 6445989741831 is 1381479895446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 6445989741831 - 2¹⁰ = 6445989740807 is a prime.

It is a super-2 number, since 2×6445989741831² (a number of 26 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6445989741871) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 37045917970 + ... + 37045918143.

It is an arithmetic number, because the mean of its divisors is an integer number (1111377541710).

Almost surely, 2^{6445989741831} is an apocalyptic number.

6445989741831 is a deficient number, since it is larger than the sum of its proper divisors (2445030591849).

6445989741831 is a wasteful number, since it uses less digits than its factorization.

6445989741831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74091836145.

The product of its digits is 209018880, while the sum is 69.

The spelling of 6445989741831 in words is "six trillion, four hundred forty-five billion, nine hundred eighty-nine million, seven hundred forty-one thousand, eight hundred thirty-one".