6216057891 has 6 divisors (see below), whose sum is σ = 8978750300. Its totient is φ = 4144038588.

The previous prime is 6216057889. The next prime is 6216057959. The reversal of 6216057891 is 1987506126.

6216057891 is a `hidden beast` number, since 62 + 16 + 0 + 578 + 9 + 1 = 666.

It is not a de Polignac number, because 6216057891 - 2¹ = 6216057889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6216057691) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 345336541 + ... + 345336558.

Almost surely, 2^6216057891 is an apocalyptic number.

6216057891 is a deficient number, since it is larger than the sum of its proper divisors (2762692409).

6216057891 is a wasteful number, since it uses less digits than its factorization.

6216057891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 690673105 (or 690673102 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 45.

The square root of 6216057891 is about 78841.9805116538. The cubic root of 6216057891 is about 1838.6751934768.

The spelling of 6216057891 in words is "six billion, two hundred sixteen million, fifty-seven thousand, eight hundred ninety-one".