1025552750861 has 2 divisors, whose sum is σ = 1025552750862. Its totient is φ = 1025552750860.

The previous prime is 1025552750779. The next prime is 1025552750867. The reversal of 1025552750861 is 1680572555201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1025379012100 + 173738761 = 1012610^2 + 13181^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1025552750861 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025552750867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512776375430 + 512776375431.

It is an arithmetic number, because the mean of its divisors is an integer number (512776375431).

Almost surely, 2^{1025552750861} is an apocalyptic number.

It is an amenable number.

1025552750861 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025552750861 is an equidigital number, since it uses as much as digits as its factorization.

1025552750861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 840000, while the sum is 47.

The spelling of 1025552750861 in words is "one trillion, twenty-five billion, five hundred fifty-two million, seven hundred fifty thousand, eight hundred sixty-one".