6543138004 has 24 divisors (see below), whose sum is σ = 12479876640. Its totient is φ = 2983523424.

The previous prime is 6543137987. The next prime is 6543138031. The reversal of 6543138004 is 4008313456.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 753694 + ... + 762325.

It is an arithmetic number, because the mean of its divisors is an integer number (519994860).

Almost surely, 2^6543138004 is an apocalyptic number.

It is an amenable number.

6543138004 is a deficient number, since it is larger than the sum of its proper divisors (5936738636).

6543138004 is a wasteful number, since it uses less digits than its factorization.

6543138004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1516119 (or 1516117 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 6543138004 is about 80889.6656192866. The cubic root of 6543138004 is about 1870.3750192990.

The spelling of 6543138004 in words is "six billion, five hundred forty-three million, one hundred thirty-eight thousand, four".