1025511305557 has 2 divisors, whose sum is σ = 1025511305558. Its totient is φ = 1025511305556.

The previous prime is 1025511305543. The next prime is 1025511305569. The reversal of 1025511305557 is 7555031155201.

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., 987610613796 + 37900691761 = 993786^2 + 194681^2 .

It is a cyclic number.

It is not a de Polignac number, because 1025511305557 - 2²⁷ = 1025377087829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1025511305057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512755652778 + 512755652779.

It is an arithmetic number, because the mean of its divisors is an integer number (512755652779).

Almost surely, 2^{1025511305557} is an apocalyptic number.

It is an amenable number.

1025511305557 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025511305557 is an equidigital number, since it uses as much as digits as its factorization.

1025511305557 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131250, while the sum is 40.

The spelling of 1025511305557 in words is "one trillion, twenty-five billion, five hundred eleven million, three hundred five thousand, five hundred fifty-seven".