6361681 has 4 divisors (see below), whose sum is σ = 6375232. Its totient is φ = 6348132.

The previous prime is 6361679. The next prime is 6361699. The reversal of 6361681 is 1861636.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6361681 - 2¹ = 6361679 is a prime.

It is a super-2 number, since 2×6361681² = 80941970291522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6361651) 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, 6045 + ... + 7018.

It is an arithmetic number, because the mean of its divisors is an integer number (1593808).

Almost surely, 2^6361681 is an apocalyptic number.

It is an amenable number.

6361681 is a deficient number, since it is larger than the sum of its proper divisors (13551).

6361681 is a wasteful number, since it uses less digits than its factorization.

6361681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13550.

The product of its digits is 5184, while the sum is 31.

The square root of 6361681 is about 2522.2373004934. The cubic root of 6361681 is about 185.2922675117.

The spelling of 6361681 in words is "six million, three hundred sixty-one thousand, six hundred eighty-one".