6858634561 has 4 divisors (see below), whose sum is σ = 6945452800. Its totient is φ = 6771816324.

The previous prime is 6858634511. The next prime is 6858634579. The reversal of 6858634561 is 1654368586.

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 6858634561 - 2¹⁷ = 6858503489 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6858634499 and 6858634508.

It is not an unprimeable number, because it can be changed into a prime (6858634511) 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, 43409001 + ... + 43409158.

It is an arithmetic number, because the mean of its divisors is an integer number (1736363200).

Almost surely, 2^6858634561 is an apocalyptic number.

It is an amenable number.

6858634561 is a deficient number, since it is larger than the sum of its proper divisors (86818239).

6858634561 is an equidigital number, since it uses as much as digits as its factorization.

6858634561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86818238.

The product of its digits is 4147200, while the sum is 52.

The square root of 6858634561 is about 82816.8736490336. The cubic root of 6858634561 is about 1899.9662561874.

The spelling of 6858634561 in words is "six billion, eight hundred fifty-eight million, six hundred thirty-four thousand, five hundred sixty-one".