73643137531793 has 2 divisors, whose sum is σ = 73643137531794. Its totient is φ = 73643137531792.

The previous prime is 73643137531631. The next prime is 73643137531807. The reversal of 73643137531793 is 39713573134637.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 44222406900049 + 29420730631744 = 6649993^2 + 5424088^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-73643137531793 is a prime.

It is not a weakly prime, because it can be changed into another prime (73643137533793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36821568765896 + 36821568765897.

It is an arithmetic number, because the mean of its divisors is an integer number (36821568765897).

Almost surely, 2^{73643137531793} is an apocalyptic number.

It is an amenable number.

73643137531793 is a deficient number, since it is larger than the sum of its proper divisors (1).

73643137531793 is an equidigital number, since it uses as much as digits as its factorization.

73643137531793 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90016920, while the sum is 62.

The spelling of 73643137531793 in words is "seventy-three trillion, six hundred forty-three billion, one hundred thirty-seven million, five hundred thirty-one thousand, seven hundred ninety-three".