6981773559644 has 96 divisors (see below), whose sum is σ = 14401196199936. Its totient is φ = 2930928675840.

The previous prime is 6981773559617. The next prime is 6981773559647. The reversal of 6981773559644 is 4469553771896.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6981773559647) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 19747487 + ... + 20097929.

It is an arithmetic number, because the mean of its divisors is an integer number (150012460416).

Almost surely, 2^{6981773559644} is an apocalyptic number.

It is an amenable number.

6981773559644 is an abundant number, since it is smaller than the sum of its proper divisors (7419422640292).

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

6981773559644 is a wasteful number, since it uses less digits than its factorization.

6981773559644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 351235 (or 351233 counting only the distinct ones).

The product of its digits is 1371686400, while the sum is 74.

The spelling of 6981773559644 in words is "six trillion, nine hundred eighty-one billion, seven hundred seventy-three million, five hundred fifty-nine thousand, six hundred forty-four".