1851852057613 has 2 divisors, whose sum is σ = 1851852057614. Its totient is φ = 1851852057612.

The previous prime is 1851852057589. The next prime is 1851852057617. The reversal of 1851852057613 is 3167502581581.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1802569389604 + 49282668009 = 1342598^2 + 221997^2 .

It is a cyclic number.

It is not a de Polignac number, because 1851852057613 - 2⁹ = 1851852057101 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1851852057617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 925926028806 + 925926028807.

It is an arithmetic number, because the mean of its divisors is an integer number (925926028807).

Almost surely, 2^{1851852057613} is an apocalyptic number.

It is an amenable number.

1851852057613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1851852057613 is an equidigital number, since it uses as much as digits as its factorization.

1851852057613 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016000, while the sum is 52.

The spelling of 1851852057613 in words is "one trillion, eight hundred fifty-one billion, eight hundred fifty-two million, fifty-seven thousand, six hundred thirteen".