75818173073 has 2 divisors, whose sum is σ = 75818173074. Its totient is φ = 75818173072.

The previous prime is 75818173049. The next prime is 75818173087. The reversal of 75818173073 is 37037181857.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75728435344 + 89737729 = 275188^2 + 9473^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75818173073 is a prime.

It is not a weakly prime, because it can be changed into another prime (75818173033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37909086536 + 37909086537.

It is an arithmetic number, because the mean of its divisors is an integer number (37909086537).

Almost surely, 2^75818173073 is an apocalyptic number.

It is an amenable number.

75818173073 is a deficient number, since it is larger than the sum of its proper divisors (1).

75818173073 is an equidigital number, since it uses as much as digits as its factorization.

75818173073 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 987840, while the sum is 50.

The spelling of 75818173073 in words is "seventy-five billion, eight hundred eighteen million, one hundred seventy-three thousand, seventy-three".