75451027381 has 2 divisors, whose sum is σ = 75451027382. Its totient is φ = 75451027380.

The previous prime is 75451027343. The next prime is 75451027403. The reversal of 75451027381 is 18372015457.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 75314020356 + 137007025 = 274434^2 + 11705^2 .

It is an emirp because it is prime and its reverse (18372015457) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75451027381 - 2²³ = 75442638773 is a prime.

It is a super-3 number, since 3×75451027381³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75451027681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37725513690 + 37725513691.

It is an arithmetic number, because the mean of its divisors is an integer number (37725513691).

Almost surely, 2^75451027381 is an apocalyptic number.

It is an amenable number.

75451027381 is a deficient number, since it is larger than the sum of its proper divisors (1).

75451027381 is an equidigital number, since it uses as much as digits as its factorization.

75451027381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 235200, while the sum is 43.

The spelling of 75451027381 in words is "seventy-five billion, four hundred fifty-one million, twenty-seven thousand, three hundred eighty-one".