75821671097 has 2 divisors, whose sum is σ = 75821671098. Its totient is φ = 75821671096.

The previous prime is 75821671043. The next prime is 75821671127. The reversal of 75821671097 is 79017612857.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 62609547961 + 13212123136 = 250219^2 + 114944^2 .

It is a cyclic number.

It is not a de Polignac number, because 75821671097 - 2²² = 75817476793 is a prime.

It is not a weakly prime, because it can be changed into another prime (75821671297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37910835548 + 37910835549.

It is an arithmetic number, because the mean of its divisors is an integer number (37910835549).

Almost surely, 2^75821671097 is an apocalyptic number.

It is an amenable number.

75821671097 is a deficient number, since it is larger than the sum of its proper divisors (1).

75821671097 is an equidigital number, since it uses as much as digits as its factorization.

75821671097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1481760, while the sum is 53.

The spelling of 75821671097 in words is "seventy-five billion, eight hundred twenty-one million, six hundred seventy-one thousand, ninety-seven".