6546197477 has 4 divisors (see below), whose sum is σ = 6561821280. Its totient is φ = 6530573676.

The previous prime is 6546197453. The next prime is 6546197479. The reversal of 6546197477 is 7747916456.

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 6546197477 - 2⁸ = 6546197221 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6546197479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7811273 + ... + 7812110.

It is an arithmetic number, because the mean of its divisors is an integer number (1640455320).

Almost surely, 2^6546197477 is an apocalyptic number.

It is an amenable number.

6546197477 is a deficient number, since it is larger than the sum of its proper divisors (15623803).

6546197477 is a wasteful number, since it uses less digits than its factorization.

6546197477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15623802.

The product of its digits is 8890560, while the sum is 56.

The square root of 6546197477 is about 80908.5748051466. The cubic root of 6546197477 is about 1870.6664936243. Note that the first 3 decimals are identical.

The spelling of 6546197477 in words is "six billion, five hundred forty-six million, one hundred ninety-seven thousand, four hundred seventy-seven".