6891144411440 has 40 divisors (see below), whose sum is σ = 16574390443440. Its totient is φ = 2661407495936.

The previous prime is 6891144411433. The next prime is 6891144411461. The reversal of 6891144411440 is 441144411986.

It is a tau number, because it is divible by the number of its divisors (40).

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, 1485158114 + ... + 1485162753.

It is an arithmetic number, because the mean of its divisors is an integer number (414359761086).

Almost surely, 2^{6891144411440} is an apocalyptic number.

It is an amenable number.

6891144411440 is an abundant number, since it is smaller than the sum of its proper divisors (9683246032000).

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

6891144411440 is a wasteful number, since it uses less digits than its factorization.

6891144411440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2970320909 (or 2970320903 counting only the distinct ones).

The product of its (nonzero) digits is 442368, while the sum is 47.

The spelling of 6891144411440 in words is "six trillion, eight hundred ninety-one billion, one hundred forty-four million, four hundred eleven thousand, four hundred forty".