75161492561 has 2 divisors, whose sum is σ = 75161492562. Its totient is φ = 75161492560.

The previous prime is 75161492519. The next prime is 75161492597. The reversal of 75161492561 is 16529416157.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71767731025 + 3393761536 = 267895^2 + 58256^2 .

It is a cyclic number.

It is not a de Polignac number, because 75161492561 - 2¹⁴ = 75161476177 is a prime.

It is not a weakly prime, because it can be changed into another prime (75161497561) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37580746280 + 37580746281.

It is an arithmetic number, because the mean of its divisors is an integer number (37580746281).

Almost surely, 2^75161492561 is an apocalyptic number.

It is an amenable number.

75161492561 is a deficient number, since it is larger than the sum of its proper divisors (1).

75161492561 is an equidigital number, since it uses as much as digits as its factorization.

75161492561 is an evil number, because the sum of its binary digits is even.

The product of its digits is 453600, while the sum is 47.

The spelling of 75161492561 in words is "seventy-five billion, one hundred sixty-one million, four hundred ninety-two thousand, five hundred sixty-one".