68553520537 has 2 divisors, whose sum is σ = 68553520538. Its totient is φ = 68553520536.

The previous prime is 68553520501. The next prime is 68553520571. The reversal of 68553520537 is 73502535586.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43638792201 + 24914728336 = 208899^2 + 157844^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-68553520537 is a prime.

It is not a weakly prime, because it can be changed into another prime (68553520337) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34276760268 + 34276760269.

It is an arithmetic number, because the mean of its divisors is an integer number (34276760269).

Almost surely, 2^68553520537 is an apocalyptic number.

It is an amenable number.

68553520537 is a deficient number, since it is larger than the sum of its proper divisors (1).

68553520537 is an equidigital number, since it uses as much as digits as its factorization.

68553520537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780000, while the sum is 49.

The spelling of 68553520537 in words is "sixty-eight billion, five hundred fifty-three million, five hundred twenty thousand, five hundred thirty-seven".