6219845957 has 4 divisors (see below), whose sum is σ = 6698295660. Its totient is φ = 5741396256.

The previous prime is 6219845953. The next prime is 6219845959. The reversal of 6219845957 is 7595489126.

6219845957 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 78866²+1.

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 920151556 + 5299694401 = 30334^2 + 72799^2 .

It is a cyclic number.

It is not a de Polignac number, because 6219845957 - 2² = 6219845953 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6219845953) 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 3 ways as a sum of consecutive naturals, for example, 239224832 + ... + 239224857.

It is an arithmetic number, because the mean of its divisors is an integer number (1674573915).

Almost surely, 2^6219845957 is an apocalyptic number.

It is an amenable number.

6219845957 is a deficient number, since it is larger than the sum of its proper divisors (478449703).

6219845957 is a wasteful number, since it uses less digits than its factorization.

6219845957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478449702.

The product of its digits is 5443200, while the sum is 56.

The square root of 6219845957 is about 78866.0000063399. Note that the first 5 decimals coincide. The cubic root of 6219845957 is about 1839.0486138856.

The spelling of 6219845957 in words is "six billion, two hundred nineteen million, eight hundred forty-five thousand, nine hundred fifty-seven".