1804987612573 has 2 divisors, whose sum is σ = 1804987612574. Its totient is φ = 1804987612572.

The previous prime is 1804987612501. The next prime is 1804987612609. The reversal of 1804987612573 is 3752167894081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1128445172089 + 676542440484 = 1062283^2 + 822522^2 .

It is a cyclic number.

It is not a de Polignac number, because 1804987612573 - 2⁹ = 1804987612061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1804987612073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902493806286 + 902493806287.

It is an arithmetic number, because the mean of its divisors is an integer number (902493806287).

It is a 1-persistent number, because it is pandigital, but 2⋅1804987612573 = 3609975225146 is not.

Almost surely, 2^{1804987612573} is an apocalyptic number.

It is an amenable number.

1804987612573 is a deficient number, since it is larger than the sum of its proper divisors (1).

1804987612573 is an equidigital number, since it uses as much as digits as its factorization.

1804987612573 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20321280, while the sum is 61.

The spelling of 1804987612573 in words is "one trillion, eight hundred four billion, nine hundred eighty-seven million, six hundred twelve thousand, five hundred seventy-three".