6331778778543 has 4 divisors (see below), whose sum is σ = 8442371704728. Its totient is φ = 4221185852360.

The previous prime is 6331778778529. The next prime is 6331778778583. The reversal of 6331778778543 is 3458778771336.

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

It is a cyclic number.

It is not a de Polignac number, because 6331778778543 - 2²⁹ = 6331241907631 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6331778778583) 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, 1055296463088 + ... + 1055296463093.

It is an arithmetic number, because the mean of its divisors is an integer number (2110592926182).

Almost surely, 2^{6331778778543} is an apocalyptic number.

6331778778543 is a deficient number, since it is larger than the sum of its proper divisors (2110592926185).

6331778778543 is a wasteful number, since it uses less digits than its factorization.

6331778778543 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110592926184.

The product of its digits is 497871360, while the sum is 69.

The spelling of 6331778778543 in words is "six trillion, three hundred thirty-one billion, seven hundred seventy-eight million, seven hundred seventy-eight thousand, five hundred forty-three".