67612905049 has 2 divisors, whose sum is σ = 67612905050. Its totient is φ = 67612905048.

The previous prime is 67612905037. The next prime is 67612905071. The reversal of 67612905049 is 94050921676.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40505587600 + 27107317449 = 201260^2 + 164643^2 .

It is a cyclic number.

It is not a de Polignac number, because 67612905049 - 2²¹ = 67610807897 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 67612904993 and 67612905011.

It is not a weakly prime, because it can be changed into another prime (67612905089) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33806452524 + 33806452525.

It is an arithmetic number, because the mean of its divisors is an integer number (33806452525).

Almost surely, 2^67612905049 is an apocalyptic number.

It is an amenable number.

67612905049 is a deficient number, since it is larger than the sum of its proper divisors (1).

67612905049 is an equidigital number, since it uses as much as digits as its factorization.

67612905049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 816480, while the sum is 49.

The spelling of 67612905049 in words is "sixty-seven billion, six hundred twelve million, nine hundred five thousand, forty-nine".