2891377885056 has 512 divisors, whose sum is σ = 8358764544000. Its totient is φ = 882802851840.

The previous prime is 2891377885043. The next prime is 2891377885061. The reversal of 2891377885056 is 6505887731982.

It is a congruent number.

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 63 ways as a sum of consecutive naturals, for example, 6708533161 + ... + 6708533591.

It is an arithmetic number, because the mean of its divisors is an integer number (16325712000).

Almost surely, 2^{2891377885056} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2891377885056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4179382272000).

2891377885056 is an abundant number, since it is smaller than the sum of its proper divisors (5467386658944).

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

2891377885056 is a wasteful number, since it uses less digits than its factorization.

2891377885056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 762 (or 750 counting only the distinct ones).

The product of its (nonzero) digits is 203212800, while the sum is 69.

The spelling of 2891377885056 in words is "two trillion, eight hundred ninety-one billion, three hundred seventy-seven million, eight hundred eighty-five thousand, fifty-six".