1827736690865 has 8 divisors (see below), whose sum is σ = 2193292057320. Its totient is φ = 1462184000512.

The previous prime is 1827736690859. The next prime is 1827736690907. The reversal of 1827736690865 is 5680966377281.

It can be written as a sum of positive squares in 4 ways, for example, as 176172433441 + 1651564257424 = 419729^2 + 1285132^2 .

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 1827736690865 - 2²⁶ = 1827669582001 is a prime.

It is a super-2 number, since 2×1827736690865² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1827736690795 and 1827736690804.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1435217 + ... + 2390673.

It is an arithmetic number, because the mean of its divisors is an integer number (274161507165).

Almost surely, 2^{1827736690865} is an apocalyptic number.

It is an amenable number.

1827736690865 is a deficient number, since it is larger than the sum of its proper divisors (365555366455).

1827736690865 is an equidigital number, since it uses as much as digits as its factorization.

1827736690865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1338051.

The product of its (nonzero) digits is 182891520, while the sum is 68.

The spelling of 1827736690865 in words is "one trillion, eight hundred twenty-seven billion, seven hundred thirty-six million, six hundred ninety thousand, eight hundred sixty-five".