6506999904 has 48 divisors (see below), whose sum is σ = 17108893872. Its totient is φ = 2165442048.

The previous prime is 6506999879. The next prime is 6506999909. The reversal of 6506999904 is 4099996056.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6506999909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3562 + ... + 114134.

It is an arithmetic number, because the mean of its divisors is an integer number (356435289).

Almost surely, 2^6506999904 is an apocalyptic number.

It is an amenable number.

6506999904 is an abundant number, since it is smaller than the sum of its proper divisors (10601893968).

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

6506999904 is a wasteful number, since it uses less digits than its factorization.

6506999904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111199 (or 111191 counting only the distinct ones).

The product of its (nonzero) digits is 4723920, while the sum is 57.

The square root of 6506999904 is about 80665.9773634461. The cubic root of 6506999904 is about 1866.9252667807.

The spelling of 6506999904 in words is "six billion, five hundred six million, nine hundred ninety-nine thousand, nine hundred four".