1852038907409 has 2 divisors, whose sum is σ = 1852038907410. Its totient is φ = 1852038907408.

The previous prime is 1852038907387. The next prime is 1852038907447. The reversal of 1852038907409 is 9047098302581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1228417555600 + 623621351809 = 1108340^2 + 789697^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1852038907409 is a prime.

It is a super-2 number, since 2×1852038907409² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1852038907469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 926019453704 + 926019453705.

It is an arithmetic number, because the mean of its divisors is an integer number (926019453705).

Almost surely, 2^{1852038907409} is an apocalyptic number.

It is an amenable number.

1852038907409 is a deficient number, since it is larger than the sum of its proper divisors (1).

1852038907409 is an equidigital number, since it uses as much as digits as its factorization.

1852038907409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4354560, while the sum is 56.

The spelling of 1852038907409 in words is "one trillion, eight hundred fifty-two billion, thirty-eight million, nine hundred seven thousand, four hundred nine".