6940579885 has 8 divisors (see below), whose sum is σ = 8818619256. Its totient is φ = 5225848320.

The previous prime is 6940579883. The next prime is 6940579909. The reversal of 6940579885 is 5889750496.

It can be written as a sum of positive squares in 4 ways, for example, as 637966564 + 6302613321 = 25258^2 + 79389^2 .

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

It is not a de Polignac number, because 6940579885 - 2¹ = 6940579883 is a prime.

It is a super-2 number, since 2×6940579885² = 96343298280133226450, 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 (6940579883) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40826856 + ... + 40827025.

It is an arithmetic number, because the mean of its divisors is an integer number (1102327407).

Almost surely, 2^6940579885 is an apocalyptic number.

It is an amenable number.

6940579885 is a deficient number, since it is larger than the sum of its proper divisors (1878039371).

6940579885 is a wasteful number, since it uses less digits than its factorization.

6940579885 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81653903.

The product of its (nonzero) digits is 21772800, while the sum is 61.

The square root of 6940579885 is about 83310.1427498477. The cubic root of 6940579885 is about 1907.5030999539.

The spelling of 6940579885 in words is "six billion, nine hundred forty million, five hundred seventy-nine thousand, eight hundred eighty-five".