1815793137233 has 2 divisors, whose sum is σ = 1815793137234. Its totient is φ = 1815793137232.

The previous prime is 1815793137229. The next prime is 1815793137241. The reversal of 1815793137233 is 3327313975181.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1783645723024 + 32147414209 = 1335532^2 + 179297^2 .

It is a cyclic number.

It is not a de Polignac number, because 1815793137233 - 2² = 1815793137229 is a prime.

It is not a weakly prime, because it can be changed into another prime (1815793139233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 907896568616 + 907896568617.

It is an arithmetic number, because the mean of its divisors is an integer number (907896568617).

Almost surely, 2^{1815793137233} is an apocalyptic number.

It is an amenable number.

1815793137233 is a deficient number, since it is larger than the sum of its proper divisors (1).

1815793137233 is an equidigital number, since it uses as much as digits as its factorization.

1815793137233 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2857680, while the sum is 53.

The spelling of 1815793137233 in words is "one trillion, eight hundred fifteen billion, seven hundred ninety-three million, one hundred thirty-seven thousand, two hundred thirty-three".