6420649486 has 16 divisors (see below), whose sum is σ = 9656917200. Its totient is φ = 3201688768.

The previous prime is 6420649483. The next prime is 6420649579. The reversal of 6420649486 is 6849460246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6420649483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1697145 + ... + 1700923.

It is an arithmetic number, because the mean of its divisors is an integer number (603557325).

Almost surely, 2^6420649486 is an apocalyptic number.

6420649486 is a deficient number, since it is larger than the sum of its proper divisors (3236267714).

6420649486 is a wasteful number, since it uses less digits than its factorization.

6420649486 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5843.

The product of its (nonzero) digits is 1990656, while the sum is 49.

The square root of 6420649486 is about 80128.9553532305. The cubic root of 6420649486 is about 1858.6301902317.

The spelling of 6420649486 in words is "six billion, four hundred twenty million, six hundred forty-nine thousand, four hundred eighty-six".