6781158116544 has 112 divisors (see below), whose sum is σ = 20508836198400. Its totient is φ = 1937104705536.

The previous prime is 6781158116531. The next prime is 6781158116599. The reversal of 6781158116544 is 4456118511876.

It is a tau number, because it is divible by the number of its divisors (112).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6617092 + ... + 7572860.

Almost surely, 2^{6781158116544} is an apocalyptic number.

6781158116544 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

6781158116544 is an abundant number, since it is smaller than the sum of its proper divisors (13727678081856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6781158116544 is a wasteful number, since it uses less digits than its factorization.

6781158116544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961070 (or 961060 counting only the distinct ones).

The product of its digits is 6451200, while the sum is 57.

The spelling of 6781158116544 in words is "six trillion, seven hundred eighty-one billion, one hundred fifty-eight million, one hundred sixteen thousand, five hundred forty-four".