75089993261 has 2 divisors, whose sum is σ = 75089993262. Its totient is φ = 75089993260.

The previous prime is 75089993239. The next prime is 75089993263. The reversal of 75089993261 is 16239998057.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 64168489225 + 10921504036 = 253315^2 + 104506^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75089993261 is a prime.

Together with 75089993263, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 75089993261.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75089993263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37544996630 + 37544996631.

It is an arithmetic number, because the mean of its divisors is an integer number (37544996631).

Almost surely, 2^75089993261 is an apocalyptic number.

It is an amenable number.

75089993261 is a deficient number, since it is larger than the sum of its proper divisors (1).

75089993261 is an equidigital number, since it uses as much as digits as its factorization.

75089993261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7348320, while the sum is 59.

The spelling of 75089993261 in words is "seventy-five billion, eighty-nine million, nine hundred ninety-three thousand, two hundred sixty-one".