6410131681 has 4 divisors (see below), whose sum is σ = 6440511664. Its totient is φ = 6379751700.

The previous prime is 6410131661. The next prime is 6410131687. The reversal of 6410131681 is 1861310146.

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, and also an emirpimes, since its reverse is a distinct semiprime: 1861310146 = 2 ⋅930655073.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6410131681 is a prime.

It is a super-2 number, since 2×6410131681² = 82179576335519771522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6410131687) 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, 15189675 + ... + 15190096.

It is an arithmetic number, because the mean of its divisors is an integer number (1610127916).

Almost surely, 2^6410131681 is an apocalyptic number.

It is an amenable number.

6410131681 is a deficient number, since it is larger than the sum of its proper divisors (30379983).

6410131681 is a wasteful number, since it uses less digits than its factorization.

6410131681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30379982.

The product of its (nonzero) digits is 3456, while the sum is 31.

The square root of 6410131681 is about 80063.2979647978. The cubic root of 6410131681 is about 1857.6147480990.

The spelling of 6410131681 in words is "six billion, four hundred ten million, one hundred thirty-one thousand, six hundred eighty-one".