6211704881 has 4 divisors (see below), whose sum is σ = 6221773092. Its totient is φ = 6201636672.

The previous prime is 6211704859. The next prime is 6211704899. The reversal of 6211704881 is 1884071126.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 156375025 + 6055329856 = 12505^2 + 77816^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6211704881 is a prime.

It is a super-2 number, since 2×6211704881² = 77170555057278448322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6211724881) 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, 5033180 + ... + 5034413.

It is an arithmetic number, because the mean of its divisors is an integer number (1555443273).

Almost surely, 2^6211704881 is an apocalyptic number.

It is an amenable number.

6211704881 is a deficient number, since it is larger than the sum of its proper divisors (10068211).

6211704881 is a wasteful number, since it uses less digits than its factorization.

6211704881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10068210.

The product of its (nonzero) digits is 21504, while the sum is 38.

The square root of 6211704881 is about 78814.3697621189. The cubic root of 6211704881 is about 1838.2458945718.

The spelling of 6211704881 in words is "six billion, two hundred eleven million, seven hundred four thousand, eight hundred eighty-one".