671557282577 has 2 divisors, whose sum is σ = 671557282578. Its totient is φ = 671557282576.

The previous prime is 671557282547. The next prime is 671557282631. The reversal of 671557282577 is 775282755176.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344652359041 + 326904923536 = 587071^2 + 571756^2 .

It is a cyclic number.

It is not a de Polignac number, because 671557282577 - 2¹² = 671557278481 is a prime.

It is not a weakly prime, because it can be changed into another prime (671557282507) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335778641288 + 335778641289.

It is an arithmetic number, because the mean of its divisors is an integer number (335778641289).

Almost surely, 2^671557282577 is an apocalyptic number.

It is an amenable number.

671557282577 is a deficient number, since it is larger than the sum of its proper divisors (1).

671557282577 is an equidigital number, since it uses as much as digits as its factorization.

671557282577 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 57624000, while the sum is 62.

The spelling of 671557282577 in words is "six hundred seventy-one billion, five hundred fifty-seven million, two hundred eighty-two thousand, five hundred seventy-seven".