6491601186 has 16 divisors (see below), whose sum is σ = 14837945664. Its totient is φ = 1854743184.

The previous prime is 6491601163. The next prime is 6491601187. The reversal of 6491601186 is 6811061946.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 154561933 = 6491601186 / (6 + 4 + 9 + 1 + 6 + 0 + 1 + 1 + 8 + 6).

It is not an unprimeable number, because it can be changed into a prime (6491601187) 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 7 ways as a sum of consecutive naturals, for example, 77280925 + ... + 77281008.

It is an arithmetic number, because the mean of its divisors is an integer number (927371604).

Almost surely, 2^6491601186 is an apocalyptic number.

6491601186 is an abundant number, since it is smaller than the sum of its proper divisors (8346344478).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6491601186 is a wasteful number, since it uses less digits than its factorization.

6491601186 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154561945.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 6491601186 is about 80570.4734130314. The cubic root of 6491601186 is about 1865.4514199780.

The spelling of 6491601186 in words is "six billion, four hundred ninety-one million, six hundred one thousand, one hundred eighty-six".