2781144165996 has 108 divisors (see below), whose sum is σ = 8194683111888. Its totient is φ = 792980725824.

The previous prime is 2781144165983. The next prime is 2781144165997. The reversal of 2781144165996 is 6995614411872.

2781144165996 is a `hidden beast` number, since 2 + 7 + 81 + 1 + 4 + 416 + 59 + 96 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (2781144165997) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 759631 + ... + 2477766.

Almost surely, 2^{2781144165996} is an apocalyptic number.

It is an amenable number.

2781144165996 is an abundant number, since it is smaller than the sum of its proper divisors (5413538945892).

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

2781144165996 is a wasteful number, since it uses less digits than its factorization.

2781144165996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3237908 (or 3237896 counting only the distinct ones).

The product of its digits is 26127360, while the sum is 63.

The spelling of 2781144165996 in words is "two trillion, seven hundred eighty-one billion, one hundred forty-four million, one hundred sixty-five thousand, nine hundred ninety-six".