1826536643 has 8 divisors (see below), whose sum is σ = 1853119680. Its totient is φ = 1800040320.

The previous prime is 1826536639. The next prime is 1826536669. The reversal of 1826536643 is 3466356281.

It is a happy number.

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

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

It is a cyclic number.

It is not a de Polignac number, because 1826536643 - 2² = 1826536639 is a prime.

It is a super-2 number, since 2×1826536643² = 6672472216443418898, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1826536594 and 1826536603.

It is not an unprimeable number, because it can be changed into a prime (1826536693) by changing a digit.

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, 21371 + ... + 64107.

It is an arithmetic number, because the mean of its divisors is an integer number (231639960).

Almost surely, 2^1826536643 is an apocalyptic number.

1826536643 is a deficient number, since it is larger than the sum of its proper divisors (26583037).

1826536643 is an equidigital number, since it uses as much as digits as its factorization.

1826536643 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43357.

The product of its digits is 622080, while the sum is 44.

The square root of 1826536643 is about 42737.9999883008. Note that the first 4 decimals coincide. The cubic root of 1826536643 is about 1222.3890842729.

The spelling of 1826536643 in words is "one billion, eight hundred twenty-six million, five hundred thirty-six thousand, six hundred forty-three".