75755941021 has 2 divisors, whose sum is σ = 75755941022. Its totient is φ = 75755941020.

The previous prime is 75755941007. The next prime is 75755941057. The reversal of 75755941021 is 12014955757.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58267200996 + 17488740025 = 241386^2 + 132245^2 .

It is a cyclic number.

It is not a de Polignac number, because 75755941021 - 2¹⁵ = 75755908253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (75755941421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37877970510 + 37877970511.

It is an arithmetic number, because the mean of its divisors is an integer number (37877970511).

Almost surely, 2^75755941021 is an apocalyptic number.

It is an amenable number.

75755941021 is a deficient number, since it is larger than the sum of its proper divisors (1).

75755941021 is an equidigital number, since it uses as much as digits as its factorization.

75755941021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 441000, while the sum is 46.

The spelling of 75755941021 in words is "seventy-five billion, seven hundred fifty-five million, nine hundred forty-one thousand, twenty-one".