75959637121 has 2 divisors, whose sum is σ = 75959637122. Its totient is φ = 75959637120.

The previous prime is 75959637113. The next prime is 75959637139. The reversal of 75959637121 is 12173695957.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58160074896 + 17799562225 = 241164^2 + 133415^2 .

It is an emirp because it is prime and its reverse (12173695957) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75959637121 - 2³ = 75959637113 is a prime.

It is not a weakly prime, because it can be changed into another prime (75959637101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37979818560 + 37979818561.

It is an arithmetic number, because the mean of its divisors is an integer number (37979818561).

Almost surely, 2^75959637121 is an apocalyptic number.

It is an amenable number.

75959637121 is a deficient number, since it is larger than the sum of its proper divisors (1).

75959637121 is an equidigital number, since it uses as much as digits as its factorization.

75959637121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3572100, while the sum is 55.

The spelling of 75959637121 in words is "seventy-five billion, nine hundred fifty-nine million, six hundred thirty-seven thousand, one hundred twenty-one".