1025388270217 has 2 divisors, whose sum is σ = 1025388270218. Its totient is φ = 1025388270216.

The previous prime is 1025388270209. The next prime is 1025388270239. The reversal of 1025388270217 is 7120728835201.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1010555709696 + 14832560521 = 1005264^2 + 121789^2 .

It is an emirp because it is prime and its reverse (7120728835201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1025388270217 - 2³ = 1025388270209 is a prime.

It is a super-2 number, since 2×1025388270217² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (1025388270617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 512694135108 + 512694135109.

It is an arithmetic number, because the mean of its divisors is an integer number (512694135109).

Almost surely, 2^{1025388270217} is an apocalyptic number.

It is an amenable number.

1025388270217 is a deficient number, since it is larger than the sum of its proper divisors (1).

1025388270217 is an equidigital number, since it uses as much as digits as its factorization.

1025388270217 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 376320, while the sum is 46.

The spelling of 1025388270217 in words is "one trillion, twenty-five billion, three hundred eighty-eight million, two hundred seventy thousand, two hundred seventeen".