6857132890 has 8 divisors (see below), whose sum is σ = 12342839220. Its totient is φ = 2742853152.

The previous prime is 6857132861. The next prime is 6857132917. The reversal of 6857132890 is 982317586.

It can be written as a sum of positive squares in 2 ways, for example, as 6363093361 + 494039529 = 79769^2 + 22227^2 .

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

It is a super-2 number, since 2×6857132890² = 94040542942239504200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342856635 + ... + 342856654.

Almost surely, 2^6857132890 is an apocalyptic number.

6857132890 is a deficient number, since it is larger than the sum of its proper divisors (5485706330).

6857132890 is a wasteful number, since it uses less digits than its factorization.

6857132890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 685713296.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 6857132890 is about 82807.8069387180. The cubic root of 6857132890 is about 1899.8275826923.

The spelling of 6857132890 in words is "six billion, eight hundred fifty-seven million, one hundred thirty-two thousand, eight hundred ninety".