2152823533769 has 4 divisors (see below), whose sum is σ = 2279460212244. Its totient is φ = 2026186855296.

The previous prime is 2152823533727. The next prime is 2152823533879. The reversal of 2152823533769 is 9673353282512.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 872565228544 + 1280258305225 = 934112^2 + 1131485^2 .

It is a cyclic number.

It is not a de Polignac number, because 2152823533769 - 2²⁰ = 2152822485193 is a prime.

It is a super-2 number, since 2×2152823533769² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2152823533369) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63318339212 + ... + 63318339245.

It is an arithmetic number, because the mean of its divisors is an integer number (569865053061).

Almost surely, 2^{2152823533769} is an apocalyptic number.

It is an amenable number.

2152823533769 is a deficient number, since it is larger than the sum of its proper divisors (126636678475).

2152823533769 is a wasteful number, since it uses less digits than its factorization.

2152823533769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126636678474.

The product of its digits is 16329600, while the sum is 56.

The spelling of 2152823533769 in words is "two trillion, one hundred fifty-two billion, eight hundred twenty-three million, five hundred thirty-three thousand, seven hundred sixty-nine".