6774385081520 has 80 divisors (see below), whose sum is σ = 18094752718848. Its totient is φ = 2310485825280.

The previous prime is 6774385081517. The next prime is 6774385081531. The reversal of 6774385081520 is 251805834776.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-3 number, since 3×6774385081520³ (a number of 39 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (56).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31560884 + ... + 31774803.

Almost surely, 2^{6774385081520} is an apocalyptic number.

It is an amenable number.

6774385081520 is an abundant number, since it is smaller than the sum of its proper divisors (11320367637328).

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

6774385081520 is a wasteful number, since it uses less digits than its factorization.

6774385081520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63335898 (or 63335892 counting only the distinct ones).

The product of its (nonzero) digits is 11289600, while the sum is 56.

The spelling of 6774385081520 in words is "six trillion, seven hundred seventy-four billion, three hundred eighty-five million, eighty-one thousand, five hundred twenty".