6490493685 has 64 divisors (see below), whose sum is σ = 12660883200. Its totient is φ = 3134985984.

The previous prime is 6490493663. The next prime is 6490493687. The reversal of 6490493685 is 5863940946.

6490493685 is a `hidden beast` number, since 6 + 4 + 90 + 493 + 68 + 5 = 666.

It is not a de Polignac number, because 6490493685 - 2⁶ = 6490493621 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6490493687) 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 63 ways as a sum of consecutive naturals, for example, 58126 + ... + 127904.

It is an arithmetic number, because the mean of its divisors is an integer number (197826300).

Almost surely, 2^6490493685 is an apocalyptic number.

6490493685 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

6490493685 is a deficient number, since it is larger than the sum of its proper divisors (6170389515).

6490493685 is a wasteful number, since it uses less digits than its factorization.

6490493685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69859 (or 69853 counting only the distinct ones).

The product of its (nonzero) digits is 5598720, while the sum is 54.

The square root of 6490493685 is about 80563.6002484993. The cubic root of 6490493685 is about 1865.3453286992.

The spelling of 6490493685 in words is "six billion, four hundred ninety million, four hundred ninety-three thousand, six hundred eighty-five".