6499404550539 has 16 divisors (see below), whose sum is σ = 9888983902240. Its totient is φ = 4215829978080.

The previous prime is 6499404550519. The next prime is 6499404550589. The reversal of 6499404550539 is 9350554049946.

6499404550539 is a `hidden beast` number, since 6 + 4 + 9 + 9 + 4 + 0 + 45 + 50 + 539 = 666.

It is not a de Polignac number, because 6499404550539 - 2²⁰ = 6499403501963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6499404550519) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3252954232 + ... + 3252956229.

It is an arithmetic number, because the mean of its divisors is an integer number (618061493890).

Almost surely, 2^{6499404550539} is an apocalyptic number.

6499404550539 is a deficient number, since it is larger than the sum of its proper divisors (3389579351701).

6499404550539 is a wasteful number, since it uses less digits than its factorization.

6499404550539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6505910507 (or 6505910501 counting only the distinct ones).

The product of its (nonzero) digits is 104976000, while the sum is 63.

The spelling of 6499404550539 in words is "six trillion, four hundred ninety-nine billion, four hundred four million, five hundred fifty thousand, five hundred thirty-nine".