6491686041 has 27 divisors (see below), whose sum is σ = 9503193973. Its totient is φ = 4270263000.

The previous prime is 6491686021. The next prime is 6491686057. The reversal of 6491686041 is 1406861946.

The square root of 6491686041 is 80571.

It is a perfect power (a square), and thus also a powerful number.

6491686041 is a `hidden beast` number, since 6 + 491 + 68 + 60 + 41 = 666.

It is not a de Polignac number, because 6491686041 - 2⁵ = 6491686009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6491686021) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 25863166 + ... + 25863416.

Almost surely, 2^6491686041 is an apocalyptic number.

6491686041 is the 80571-st square number.

6491686041 is the 40286-th centered octagonal number.

It is an amenable number.

6491686041 is a deficient number, since it is larger than the sum of its proper divisors (3011507932).

6491686041 is an equidigital number, since it uses as much as digits as its factorization.

6491686041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 722 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 45.

The cubic root of 6491686041 is about 1865.4595480287.

The spelling of 6491686041 in words is "six billion, four hundred ninety-one million, six hundred eighty-six thousand, forty-one".