67577280881609 has 2 divisors, whose sum is σ = 67577280881610. Its totient is φ = 67577280881608.

The previous prime is 67577280881557. The next prime is 67577280881699. The reversal of 67577280881609 is 90618808277576.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60399554041225 + 7177726840384 = 7771715^2 + 2679128^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67577280881609 is a prime.

It is not a weakly prime, because it can be changed into another prime (67577280881699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33788640440804 + 33788640440805.

It is an arithmetic number, because the mean of its divisors is an integer number (33788640440805).

Almost surely, 2^{67577280881609} is an apocalyptic number.

It is an amenable number.

67577280881609 is a deficient number, since it is larger than the sum of its proper divisors (1).

67577280881609 is an equidigital number, since it uses as much as digits as its factorization.

67577280881609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 568995840, while the sum is 74.

The spelling of 67577280881609 in words is "sixty-seven trillion, five hundred seventy-seven billion, two hundred eighty million, eight hundred eighty-one thousand, six hundred nine".