6859435491 has 12 divisors (see below), whose sum is σ = 9914939632. Its totient is φ = 4569788016.

The previous prime is 6859435489. The next prime is 6859435547. The reversal of 6859435491 is 1945349586.

6859435491 is a `hidden beast` number, since 6 + 8 + 5 + 94 + 3 + 549 + 1 = 666.

It is not a de Polignac number, because 6859435491 - 2¹ = 6859435489 is a prime.

It is a super-2 number, since 2×6859435491² = 94103710510380822162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6859435591) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 250336 + ... + 276381.

Almost surely, 2^6859435491 is an apocalyptic number.

6859435491 is a deficient number, since it is larger than the sum of its proper divisors (3055504141).

6859435491 is a wasteful number, since it uses less digits than its factorization.

6859435491 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 528170 (or 528167 counting only the distinct ones).

The product of its digits is 4665600, while the sum is 54.

The square root of 6859435491 is about 82821.7090562613. The cubic root of 6859435491 is about 1900.0402106910.

The spelling of 6859435491 in words is "six billion, eight hundred fifty-nine million, four hundred thirty-five thousand, four hundred ninety-one".