1890781687068 has 24 divisors (see below), whose sum is σ = 4411850221968. Its totient is φ = 630256807296.

The previous prime is 1890781687049. The next prime is 1890781687117. The reversal of 1890781687068 is 8607861870981.

It is a junction number, because it is equal to n+sod(n) for n = 1890781686993 and 1890781687011.

It is a congruent number.

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, 2266530 + ... + 2986422.

It is an arithmetic number, because the mean of its divisors is an integer number (183827092582).

Almost surely, 2^{1890781687068} is an apocalyptic number.

It is an amenable number.

1890781687068 is an abundant number, since it is smaller than the sum of its proper divisors (2521068534900).

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

1890781687068 is a wasteful number, since it uses less digits than its factorization.

1890781687068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938773 (or 938771 counting only the distinct ones).

The product of its (nonzero) digits is 65028096, while the sum is 69.

The spelling of 1890781687068 in words is "one trillion, eight hundred ninety billion, seven hundred eighty-one million, six hundred eighty-seven thousand, sixty-eight".