2145820011575 has 6 divisors (see below), whose sum is σ = 2660816814384. Its totient is φ = 1716656009240.

The previous prime is 2145820011527. The next prime is 2145820011583. The reversal of 2145820011575 is 5751100285412.

It is not a de Polignac number, because 2145820011575 - 2²⁴ = 2145803234359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 42916400207 + ... + 42916400256.

It is an arithmetic number, because the mean of its divisors is an integer number (443469469064).

Almost surely, 2^{2145820011575} is an apocalyptic number.

2145820011575 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2145820011575 is a deficient number, since it is larger than the sum of its proper divisors (514996802809).

2145820011575 is an equidigital number, since it uses as much as digits as its factorization.

2145820011575 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85832800473 (or 85832800468 counting only the distinct ones).

The product of its (nonzero) digits is 112000, while the sum is 41.

Adding to 2145820011575 its reverse (5751100285412), we get a palindrome (7896920296987).

The spelling of 2145820011575 in words is "two trillion, one hundred forty-five billion, eight hundred twenty million, eleven thousand, five hundred seventy-five".