8425925841661 has 2 divisors, whose sum is σ = 8425925841662. Its totient is φ = 8425925841660.

The previous prime is 8425925841647. The next prime is 8425925841667. The reversal of 8425925841661 is 1661485295248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7092607608025 + 1333318233636 = 2663195^2 + 1154694^2 .

It is a cyclic number.

It is not a de Polignac number, because 8425925841661 - 2⁹ = 8425925841149 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 8425925841661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (8425925841667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4212962920830 + 4212962920831.

It is an arithmetic number, because the mean of its divisors is an integer number (4212962920831).

Almost surely, 2^{8425925841661} is an apocalyptic number.

It is an amenable number.

8425925841661 is a deficient number, since it is larger than the sum of its proper divisors (1).

8425925841661 is an equidigital number, since it uses as much as digits as its factorization.

8425925841661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 33177600, while the sum is 61.

The spelling of 8425925841661 in words is "eight trillion, four hundred twenty-five billion, nine hundred twenty-five million, eight hundred forty-one thousand, six hundred sixty-one".