67856612149 has 2 divisors, whose sum is σ = 67856612150. Its totient is φ = 67856612148.

The previous prime is 67856612143. The next prime is 67856612183. The reversal of 67856612149 is 94121665876.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63676989649 + 4179622500 = 252343^2 + 64650^2 .

It is a cyclic number.

It is not a de Polignac number, because 67856612149 - 2⁹ = 67856611637 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 67856612149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (67856612143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33928306074 + 33928306075.

It is an arithmetic number, because the mean of its divisors is an integer number (33928306075).

Almost surely, 2^67856612149 is an apocalyptic number.

It is an amenable number.

67856612149 is a deficient number, since it is larger than the sum of its proper divisors (1).

67856612149 is an equidigital number, since it uses as much as digits as its factorization.

67856612149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4354560, while the sum is 55.

The spelling of 67856612149 in words is "sixty-seven billion, eight hundred fifty-six million, six hundred twelve thousand, one hundred forty-nine".