6345857961 has 6 divisors (see below), whose sum is σ = 9166239290. Its totient is φ = 4230571968.

The previous prime is 6345857927. The next prime is 6345857983. The reversal of 6345857961 is 1697585436.

6345857961 is a `hidden beast` number, since 6 + 3 + 4 + 5 + 8 + 579 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3281571225 + 3064286736 = 57285^2 + 55356^2 .

It is not a de Polignac number, because 6345857961 - 2⁶ = 6345857897 is a prime.

It is a super-2 number, since 2×6345857961² = 80539826522374155042, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6345857898 and 6345857907.

It is not an unprimeable number, because it can be changed into a prime (6345857561) 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 5 ways as a sum of consecutive naturals, for example, 352547656 + ... + 352547673.

Almost surely, 2^6345857961 is an apocalyptic number.

It is an amenable number.

6345857961 is a deficient number, since it is larger than the sum of its proper divisors (2820381329).

6345857961 is a wasteful number, since it uses less digits than its factorization.

6345857961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 705095335 (or 705095332 counting only the distinct ones).

The product of its digits is 5443200, while the sum is 54.

The square root of 6345857961 is about 79660.8935488424. The cubic root of 6345857961 is about 1851.3851774497.

The spelling of 6345857961 in words is "six billion, three hundred forty-five million, eight hundred fifty-seven thousand, nine hundred sixty-one".