6491811730 has 16 divisors (see below), whose sum is σ = 11687889024. Its totient is φ = 2596140720.

The previous prime is 6491811707. The next prime is 6491811731. The reversal of 6491811730 is 371181946.

It is not an unprimeable number, because it can be changed into a prime (6491811731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24792 + ... + 116611.

It is an arithmetic number, because the mean of its divisors is an integer number (730493064).

Almost surely, 2^6491811730 is an apocalyptic number.

6491811730 is a deficient number, since it is larger than the sum of its proper divisors (5196077294).

6491811730 is a wasteful number, since it uses less digits than its factorization.

6491811730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146001.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 6491811730 is about 80571.7799853025. The cubic root of 6491811730 is about 1865.4715873371.

The spelling of 6491811730 in words is "six billion, four hundred ninety-one million, eight hundred eleven thousand, seven hundred thirty".