75028331561 has 2 divisors, whose sum is σ = 75028331562. Its totient is φ = 75028331560.

The previous prime is 75028331551. The next prime is 75028331597. The reversal of 75028331561 is 16513382057.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39305441536 + 35722890025 = 198256^2 + 189005^2 .

It is a cyclic number.

It is not a de Polignac number, because 75028331561 - 2³⁴ = 57848462377 is a prime.

It is not a weakly prime, because it can be changed into another prime (75028331531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37514165780 + 37514165781.

It is an arithmetic number, because the mean of its divisors is an integer number (37514165781).

Almost surely, 2^75028331561 is an apocalyptic number.

It is an amenable number.

75028331561 is a deficient number, since it is larger than the sum of its proper divisors (1).

75028331561 is an equidigital number, since it uses as much as digits as its factorization.

75028331561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 151200, while the sum is 41.

The spelling of 75028331561 in words is "seventy-five billion, twenty-eight million, three hundred thirty-one thousand, five hundred sixty-one".