2165281003768 has 8 divisors (see below), whose sum is σ = 4059901882080. Its totient is φ = 1082640501880.

The previous prime is 2165281003763. The next prime is 2165281003793. The reversal of 2165281003768 is 8673001825612.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165281003763) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 135330062728 + ... + 135330062743.

It is an arithmetic number, because the mean of its divisors is an integer number (507487735260).

Almost surely, 2^{2165281003768} is an apocalyptic number.

It is an amenable number.

2165281003768 is a deficient number, since it is larger than the sum of its proper divisors (1894620878312).

2165281003768 is a wasteful number, since it uses less digits than its factorization.

2165281003768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270660125477 (or 270660125473 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 2165281003768 in words is "two trillion, one hundred sixty-five billion, two hundred eighty-one million, three thousand, seven hundred sixty-eight".