2177055868640 has 96 divisors (see below), whose sum is σ = 5456671375680. Its totient is φ = 817967570944.

The previous prime is 2177055868583. The next prime is 2177055868651. The reversal of 2177055868640 is 468685507712.

It is a self number, because there is not a number n which added to its sum of digits gives 2177055868640.

It is a congruent number.

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, 572546 + ... + 2163774.

It is an arithmetic number, because the mean of its divisors is an integer number (56840326830).

Almost surely, 2^{2177055868640} is an apocalyptic number.

2177055868640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2177055868640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2728335687840).

2177055868640 is an abundant number, since it is smaller than the sum of its proper divisors (3279615507040).

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

2177055868640 is a wasteful number, since it uses less digits than its factorization.

2177055868640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1591764 (or 1591756 counting only the distinct ones).

The product of its (nonzero) digits is 22579200, while the sum is 59.

The spelling of 2177055868640 in words is "two trillion, one hundred seventy-seven billion, fifty-five million, eight hundred sixty-eight thousand, six hundred forty".