427660601549 has 2 divisors, whose sum is σ = 427660601550. Its totient is φ = 427660601548.

The previous prime is 427660601519. The next prime is 427660601561. The reversal of 427660601549 is 945106066724.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 262026253225 + 165634348324 = 511885^2 + 406982^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-427660601549 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 427660601497 and 427660601506.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (427660601519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213830300774 + 213830300775.

It is an arithmetic number, because the mean of its divisors is an integer number (213830300775).

Almost surely, 2^427660601549 is an apocalyptic number.

It is an amenable number.

427660601549 is a deficient number, since it is larger than the sum of its proper divisors (1).

427660601549 is an equidigital number, since it uses as much as digits as its factorization.

427660601549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 427660601549 in words is "four hundred twenty-seven billion, six hundred sixty million, six hundred one thousand, five hundred forty-nine".