75249132181 has 2 divisors, whose sum is σ = 75249132182. Its totient is φ = 75249132180.

The previous prime is 75249132151. The next prime is 75249132187. The reversal of 75249132181 is 18123194257.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74820849156 + 428283025 = 273534^2 + 20695^2 .

It is a cyclic number.

It is not a de Polignac number, because 75249132181 - 2⁵ = 75249132149 is a prime.

It is a super-2 number, since 2×75249132181² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75249132187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37624566090 + 37624566091.

It is an arithmetic number, because the mean of its divisors is an integer number (37624566091).

Almost surely, 2^75249132181 is an apocalyptic number.

It is an amenable number.

75249132181 is a deficient number, since it is larger than the sum of its proper divisors (1).

75249132181 is an equidigital number, since it uses as much as digits as its factorization.

75249132181 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 43.

The spelling of 75249132181 in words is "seventy-five billion, two hundred forty-nine million, one hundred thirty-two thousand, one hundred eighty-one".