75764561 has 2 divisors, whose sum is σ = 75764562. Its totient is φ = 75764560.

The previous prime is 75764537. The next prime is 75764587. The reversal of 75764561 is 16546757.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61324561 + 14440000 = 7831^2 + 3800^2 .

It is an emirp because it is prime and its reverse (16546757) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 75764561 - 2¹⁰ = 75763537 is a prime.

It is a super-3 number, since 3×75764561³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (75764531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37882280 + 37882281.

It is an arithmetic number, because the mean of its divisors is an integer number (37882281).

Almost surely, 2^75764561 is an apocalyptic number.

It is an amenable number.

75764561 is a deficient number, since it is larger than the sum of its proper divisors (1).

75764561 is an equidigital number, since it uses as much as digits as its factorization.

75764561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 176400, while the sum is 41.

The square root of 75764561 is about 8704.2840601626. The cubic root of 75764561 is about 423.1445033109.

The spelling of 75764561 in words is "seventy-five million, seven hundred sixty-four thousand, five hundred sixty-one".