2165263425536 has 56 divisors (see below), whose sum is σ = 4331960094000. Its totient is φ = 1082207305728.

The previous prime is 2165263425491. The next prime is 2165263425581. The reversal of 2165263425536 is 6355243625612.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2165263425491) and next prime (2165263425581).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21387965 + ... + 21488963.

It is an arithmetic number, because the mean of its divisors is an integer number (77356430250).

Almost surely, 2^{2165263425536} 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 2165263425536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2165980047000).

2165263425536 is an abundant number, since it is smaller than the sum of its proper divisors (2166696668464).

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

2165263425536 is an equidigital number, since it uses as much as digits as its factorization.

2165263425536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103642 (or 103618 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 50.

The spelling of 2165263425536 in words is "two trillion, one hundred sixty-five billion, two hundred sixty-three million, four hundred twenty-five thousand, five hundred thirty-six".