1012105825789 has 2 divisors, whose sum is σ = 1012105825790. Its totient is φ = 1012105825788.

The previous prime is 1012105825721. The next prime is 1012105825793. The reversal of 1012105825789 is 9875285012101.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 988300421689 + 23805404100 = 994133^2 + 154290^2 .

It is a cyclic number.

It is not a de Polignac number, because 1012105825789 - 2²⁷ = 1011971608061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1012105823789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 506052912894 + 506052912895.

It is an arithmetic number, because the mean of its divisors is an integer number (506052912895).

Almost surely, 2^{1012105825789} is an apocalyptic number.

It is an amenable number.

1012105825789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1012105825789 is an equidigital number, since it uses as much as digits as its factorization.

1012105825789 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 403200, while the sum is 49.

The spelling of 1012105825789 in words is "one trillion, twelve billion, one hundred five million, eight hundred twenty-five thousand, seven hundred eighty-nine".