1826536645 has 8 divisors (see below), whose sum is σ = 2192163480. Its totient is φ = 1461016320.

The previous prime is 1826536639. The next prime is 1826536669. The reversal of 1826536645 is 5466356281.

It is a Cunningham number, because it is equal to 42738²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 22071204 + 1804465441 = 4698^2 + 42479^2 .

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

It is not a de Polignac number, because 1826536645 - 2³ = 1826536637 is a prime.

It is a super-2 number, since 2×1826536645² = 6672472231055712050, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1826536595 and 1826536604.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 17865 + ... + 63025.

It is an arithmetic number, because the mean of its divisors is an integer number (274020435).

Almost surely, 2^1826536645 is an apocalyptic number.

It is an amenable number.

1826536645 is a deficient number, since it is larger than the sum of its proper divisors (365626835).

1826536645 is an equidigital number, since it uses as much as digits as its factorization.

1826536645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53255.

The product of its digits is 1036800, while the sum is 46.

The square root of 1826536645 is about 42738.0000116992. Note that the first 4 decimals coincide. The cubic root of 1826536645 is about 1222.3890847190.

The spelling of 1826536645 in words is "one billion, eight hundred twenty-six million, five hundred thirty-six thousand, six hundred forty-five".