6857441581 has 4 divisors (see below), whose sum is σ = 6911437312. Its totient is φ = 6803445852.

The previous prime is 6857441579. The next prime is 6857441597. The reversal of 6857441581 is 1851447586.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6857441581 - 2¹ = 6857441579 is a prime.

It is a super-2 number, since 2×6857441581² = 94049010073655559122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6857441551) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26997675 + ... + 26997928.

It is an arithmetic number, because the mean of its divisors is an integer number (1727859328).

Almost surely, 2^6857441581 is an apocalyptic number.

It is an amenable number.

6857441581 is a deficient number, since it is larger than the sum of its proper divisors (53995731).

6857441581 is a wasteful number, since it uses less digits than its factorization.

6857441581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53995730.

The product of its digits is 1075200, while the sum is 49.

The square root of 6857441581 is about 82809.6708180874. The cubic root of 6857441581 is about 1899.8560907624.

The spelling of 6857441581 in words is "six billion, eight hundred fifty-seven million, four hundred forty-one thousand, five hundred eighty-one".