67688044537 has 2 divisors, whose sum is σ = 67688044538. Its totient is φ = 67688044536.

The previous prime is 67688044513. The next prime is 67688044643. The reversal of 67688044537 is 73544088676.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54619896681 + 13068147856 = 233709^2 + 114316^2 .

It is a cyclic number.

It is not a de Polignac number, because 67688044537 - 2³⁵ = 33328306169 is a prime.

It is not a weakly prime, because it can be changed into another prime (67188044537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33844022268 + 33844022269.

It is an arithmetic number, because the mean of its divisors is an integer number (33844022269).

Almost surely, 2^67688044537 is an apocalyptic number.

It is an amenable number.

67688044537 is a deficient number, since it is larger than the sum of its proper divisors (1).

67688044537 is an equidigital number, since it uses as much as digits as its factorization.

67688044537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 27095040, while the sum is 58.

The spelling of 67688044537 in words is "sixty-seven billion, six hundred eighty-eight million, forty-four thousand, five hundred thirty-seven".