1804639075957 has 2 divisors, whose sum is σ = 1804639075958. Its totient is φ = 1804639075956.

The previous prime is 1804639075933. The next prime is 1804639075969. The reversal of 1804639075957 is 7595709364081.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 929467599921 + 875171476036 = 964089^2 + 935506^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1804639075957 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1804639075907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 902319537978 + 902319537979.

It is an arithmetic number, because the mean of its divisors is an integer number (902319537979).

Almost surely, 2^{1804639075957} is an apocalyptic number.

It is an amenable number.

1804639075957 is a deficient number, since it is larger than the sum of its proper divisors (1).

1804639075957 is an equidigital number, since it uses as much as digits as its factorization.

1804639075957 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 57153600, while the sum is 64.

The spelling of 1804639075957 in words is "one trillion, eight hundred four billion, six hundred thirty-nine million, seventy-five thousand, nine hundred fifty-seven".