1813045017869 has 2 divisors, whose sum is σ = 1813045017870. Its totient is φ = 1813045017868.

The previous prime is 1813045017799. The next prime is 1813045017877. The reversal of 1813045017869 is 9687105403181.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1152176826025 + 660868191844 = 1073395^2 + 812938^2 .

It is a cyclic number.

It is not a de Polignac number, because 1813045017869 - 2²⁰ = 1813043969293 is a prime.

It is a super-2 number, since 2×1813045017869² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1813045017869.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1813045017899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 906522508934 + 906522508935.

It is an arithmetic number, because the mean of its divisors is an integer number (906522508935).

Almost surely, 2^{1813045017869} is an apocalyptic number.

It is an amenable number.

1813045017869 is a deficient number, since it is larger than the sum of its proper divisors (1).

1813045017869 is an equidigital number, since it uses as much as digits as its factorization.

1813045017869 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1451520, while the sum is 53.

The spelling of 1813045017869 in words is "one trillion, eight hundred thirteen billion, forty-five million, seventeen thousand, eight hundred sixty-nine".