68734157573 has 2 divisors, whose sum is σ = 68734157574. Its totient is φ = 68734157572.

The previous prime is 68734157549. The next prime is 68734157593. The reversal of 68734157573 is 37575143786.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 68610991969 + 123165604 = 261937^2 + 11098^2 .

It is a cyclic number.

It is not a de Polignac number, because 68734157573 - 2²⁴ = 68717380357 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (68734157543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34367078786 + 34367078787.

It is an arithmetic number, because the mean of its divisors is an integer number (34367078787).

Almost surely, 2^68734157573 is an apocalyptic number.

It is an amenable number.

68734157573 is a deficient number, since it is larger than the sum of its proper divisors (1).

68734157573 is an equidigital number, since it uses as much as digits as its factorization.

68734157573 is an evil number, because the sum of its binary digits is even.

The product of its digits is 14817600, while the sum is 56.

The spelling of 68734157573 in words is "sixty-eight billion, seven hundred thirty-four million, one hundred fifty-seven thousand, five hundred seventy-three".