6490064731 has 4 divisors (see below), whose sum is σ = 6490455472. Its totient is φ = 6489673992.

The previous prime is 6490064717. The next prime is 6490064743. The reversal of 6490064731 is 1374600946.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6490064731 - 2⁵ = 6490064699 is a prime.

It is a super-2 number, since 2×6490064731² = 84241880425140204722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6490034731) 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, 169296 + ... + 204061.

It is an arithmetic number, because the mean of its divisors is an integer number (1622613868).

Almost surely, 2^6490064731 is an apocalyptic number.

6490064731 is a deficient number, since it is larger than the sum of its proper divisors (390741).

6490064731 is a wasteful number, since it uses less digits than its factorization.

6490064731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 390740.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 6490064731 is about 80560.9379972701. The cubic root of 6490064731 is about 1865.3042344976.

The spelling of 6490064731 in words is "six billion, four hundred ninety million, sixty-four thousand, seven hundred thirty-one".