67601604449 has 2 divisors, whose sum is σ = 67601604450. Its totient is φ = 67601604448.

The previous prime is 67601604443. The next prime is 67601604479. The reversal of 67601604449 is 94440610676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61141463824 + 6460140625 = 247268^2 + 80375^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-67601604449 is a prime.

It is not a weakly prime, because it can be changed into another prime (67601604443) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33800802224 + 33800802225.

It is an arithmetic number, because the mean of its divisors is an integer number (33800802225).

Almost surely, 2^67601604449 is an apocalyptic number.

It is an amenable number.

67601604449 is a deficient number, since it is larger than the sum of its proper divisors (1).

67601604449 is an equidigital number, since it uses as much as digits as its factorization.

67601604449 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 870912, while the sum is 47.

The spelling of 67601604449 in words is "sixty-seven billion, six hundred one million, six hundred four thousand, four hundred forty-nine".