75321217889 has 2 divisors, whose sum is σ = 75321217890. Its totient is φ = 75321217888.

The previous prime is 75321217771. The next prime is 75321217969. The reversal of 75321217889 is 98871212357.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74083585489 + 1237632400 = 272183^2 + 35180^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75321217889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75321217889.

It is not a weakly prime, because it can be changed into another prime (75321217289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37660608944 + 37660608945.

It is an arithmetic number, because the mean of its divisors is an integer number (37660608945).

Almost surely, 2^75321217889 is an apocalyptic number.

It is an amenable number.

75321217889 is a deficient number, since it is larger than the sum of its proper divisors (1).

75321217889 is an equidigital number, since it uses as much as digits as its factorization.

75321217889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 53.

The spelling of 75321217889 in words is "seventy-five billion, three hundred twenty-one million, two hundred seventeen thousand, eight hundred eighty-nine".