1851833353361 has 2 divisors, whose sum is σ = 1851833353362. Its totient is φ = 1851833353360.

The previous prime is 1851833353313. The next prime is 1851833353379. The reversal of 1851833353361 is 1633533381581.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1824295942225 + 27537411136 = 1350665^2 + 165944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1851833353361 is a prime.

It is not a weakly prime, because it can be changed into another prime (1851833353301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925916676680 + 925916676681.

It is an arithmetic number, because the mean of its divisors is an integer number (925916676681).

Almost surely, 2^{1851833353361} is an apocalyptic number.

It is an amenable number.

1851833353361 is a deficient number, since it is larger than the sum of its proper divisors (1).

1851833353361 is an equidigital number, since it uses as much as digits as its factorization.

1851833353361 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2332800, while the sum is 50.

The spelling of 1851833353361 in words is "one trillion, eight hundred fifty-one billion, eight hundred thirty-three million, three hundred fifty-three thousand, three hundred sixty-one".