75489559961 has 2 divisors, whose sum is σ = 75489559962. Its totient is φ = 75489559960.

The previous prime is 75489559913. The next prime is 75489560051. The reversal of 75489559961 is 16995598457.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67329870400 + 8159689561 = 259480^2 + 90331^2 .

It is a cyclic number.

It is not a de Polignac number, because 75489559961 - 2¹⁸ = 75489297817 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 75489559891 and 75489559900.

It is not a weakly prime, because it can be changed into another prime (75489559361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37744779980 + 37744779981.

It is an arithmetic number, because the mean of its divisors is an integer number (37744779981).

Almost surely, 2^75489559961 is an apocalyptic number.

It is an amenable number.

75489559961 is a deficient number, since it is larger than the sum of its proper divisors (1).

75489559961 is an equidigital number, since it uses as much as digits as its factorization.

75489559961 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 122472000, while the sum is 68.

The spelling of 75489559961 in words is "seventy-five billion, four hundred eighty-nine million, five hundred fifty-nine thousand, nine hundred sixty-one".