6543138001 has 4 divisors (see below), whose sum is σ = 6603166900. Its totient is φ = 6483109104.

The previous prime is 6543137987. The next prime is 6543138031. The reversal of 6543138001 is 1008313456.

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

It can be written as a sum of positive squares in 2 ways, for example, as 2323336401 + 4219801600 = 48201^2 + 64960^2 .

It is a cyclic number.

It is not a de Polignac number, because 6543138001 - 2¹³ = 6543129809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6543138031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30014286 + ... + 30014503.

It is an arithmetic number, because the mean of its divisors is an integer number (1650791725).

Almost surely, 2^6543138001 is an apocalyptic number.

It is an amenable number.

6543138001 is a deficient number, since it is larger than the sum of its proper divisors (60028899).

6543138001 is a wasteful number, since it uses less digits than its factorization.

6543138001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60028898.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 6543138001 is about 80889.6656007428. The cubic root of 6543138001 is about 1870.3750190131.

The spelling of 6543138001 in words is "six billion, five hundred forty-three million, one hundred thirty-eight thousand, one".