6440832857152 has 56 divisors (see below), whose sum is σ = 13503358759040. Its totient is φ = 3039662661120.

The previous prime is 6440832857149. The next prime is 6440832857203. The reversal of 6440832857152 is 2517582380446.

It is a happy number.

It is a super-2 number, since 2×6440832857152² (a number of 26 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6440832857093 and 6440832857102.

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, 9443043 + ... + 10102114.

Almost surely, 2^{6440832857152} is an apocalyptic number.

It is an amenable number.

6440832857152 is an abundant number, since it is smaller than the sum of its proper divisors (7062525901888).

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

6440832857152 is a wasteful number, since it uses less digits than its factorization.

6440832857152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19545459 (or 19545449 counting only the distinct ones).

The product of its (nonzero) digits is 12902400, while the sum is 55.

The spelling of 6440832857152 in words is "six trillion, four hundred forty billion, eight hundred thirty-two million, eight hundred fifty-seven thousand, one hundred fifty-two".