2165281003749 has 8 divisors (see below), whose sum is σ = 2926589850112. Its totient is φ = 1423746413280.

The previous prime is 2165281003693. The next prime is 2165281003757. The reversal of 2165281003749 is 9473001825612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2165281003749 - 2¹¹ = 2165281001701 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2165281003698 and 2165281003707.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2165281003799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4943563717 + ... + 4943564154.

It is an arithmetic number, because the mean of its divisors is an integer number (365823731264).

It is a 1-persistent number, because it is pandigital, but 2⋅2165281003749 = 4330562007498 is not.

Almost surely, 2^{2165281003749} is an apocalyptic number.

It is an amenable number.

2165281003749 is a deficient number, since it is larger than the sum of its proper divisors (761308846363).

2165281003749 is an equidigital number, since it uses as much as digits as its factorization.

2165281003749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9887127947.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 2165281003749 in words is "two trillion, one hundred sixty-five billion, two hundred eighty-one million, three thousand, seven hundred forty-nine".