6857644032 has 240 divisors, whose sum is σ = 20822681880. Its totient is φ = 2248114176.

The previous prime is 6857644021. The next prime is 6857644033. The reversal of 6857644032 is 2304467586.

6857644032 is a `hidden beast` number, since 6 + 8 + 576 + 4 + 40 + 32 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6857644033) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 11114188 + ... + 11114804.

Almost surely, 2^6857644032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6857644032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10411340940).

6857644032 is an abundant number, since it is smaller than the sum of its proper divisors (13965037848).

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

6857644032 is an equidigital number, since it uses as much as digits as its factorization.

6857644032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 718 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The square root of 6857644032 is about 82810.8931964871. The cubic root of 6857644032 is about 1899.8747869470.

The spelling of 6857644032 in words is "six billion, eight hundred fifty-seven million, six hundred forty-four thousand, thirty-two".