6543977458009 has 4 divisors (see below), whose sum is σ = 6888397324240. Its totient is φ = 6199557591780.

The previous prime is 6543977458003. The next prime is 6543977458019. The reversal of 6543977458009 is 9008547793456.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 6543977458009 - 2³ = 6543977458001 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6543977458001) 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, 172209933087 + ... + 172209933124.

It is an arithmetic number, because the mean of its divisors is an integer number (1722099331060).

Almost surely, 2^{6543977458009} is an apocalyptic number.

It is an amenable number.

6543977458009 is a deficient number, since it is larger than the sum of its proper divisors (344419866231).

6543977458009 is a wasteful number, since it uses less digits than its factorization.

6543977458009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344419866230.

The product of its (nonzero) digits is 228614400, while the sum is 67.

The spelling of 6543977458009 in words is "six trillion, five hundred forty-three billion, nine hundred seventy-seven million, four hundred fifty-eight thousand, nine".