6331778778544 has 40 divisors (see below), whose sum is σ = 12278361188160. Its totient is φ = 3163170643968.

The previous prime is 6331778778529. The next prime is 6331778778583. The reversal of 6331778778544 is 4458778771336.

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, 89740272 + ... + 89810800.

It is an arithmetic number, because the mean of its divisors is an integer number (306959029704).

Almost surely, 2^{6331778778544} is an apocalyptic number.

It is an amenable number.

6331778778544 is a deficient number, since it is larger than the sum of its proper divisors (5946582409616).

6331778778544 is a wasteful number, since it uses less digits than its factorization.

6331778778544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75277 (or 75271 counting only the distinct ones).

The product of its digits is 663828480, while the sum is 70.

The spelling of 6331778778544 in words is "six trillion, three hundred thirty-one billion, seven hundred seventy-eight million, seven hundred seventy-eight thousand, five hundred forty-four".