1858472971057 has 2 divisors, whose sum is σ = 1858472971058. Its totient is φ = 1858472971056.

The previous prime is 1858472971049. The next prime is 1858472971127. The reversal of 1858472971057 is 7501792748581.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1708251614001 + 150221357056 = 1307001^2 + 387584^2 .

It is a cyclic number.

It is not a de Polignac number, because 1858472971057 - 2³ = 1858472971049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1858472971057.

It is not a weakly prime, because it can be changed into another prime (1858472971357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 929236485528 + 929236485529.

It is an arithmetic number, because the mean of its divisors is an integer number (929236485529).

Almost surely, 2^{1858472971057} is an apocalyptic number.

It is an amenable number.

1858472971057 is a deficient number, since it is larger than the sum of its proper divisors (1).

1858472971057 is an equidigital number, since it uses as much as digits as its factorization.

1858472971057 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 39513600, while the sum is 64.

The spelling of 1858472971057 in words is "one trillion, eight hundred fifty-eight billion, four hundred seventy-two million, nine hundred seventy-one thousand, fifty-seven".