1881187659768 has 256 divisors, whose sum is σ = 5213134080000. Its totient is φ = 563618119680.

The previous prime is 1881187659709. The next prime is 1881187659781. The reversal of 1881187659768 is 8679567811881.

It is a super-2 number, since 2×1881187659768² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1881187659768.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 288124728 + ... + 288131256.

It is an arithmetic number, because the mean of its divisors is an integer number (20363805000).

Almost surely, 2^{1881187659768} 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 1881187659768, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2606567040000).

1881187659768 is an abundant number, since it is smaller than the sum of its proper divisors (3331946420232).

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

1881187659768 is a wasteful number, since it uses less digits than its factorization.

1881187659768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7070 (or 7066 counting only the distinct ones).

The product of its digits is 325140480, while the sum is 75.

The spelling of 1881187659768 in words is "one trillion, eight hundred eighty-one billion, one hundred eighty-seven million, six hundred fifty-nine thousand, seven hundred sixty-eight".