75681026761 has 2 divisors, whose sum is σ = 75681026762. Its totient is φ = 75681026760.

The previous prime is 75681026737. The next prime is 75681026779. The reversal of 75681026761 is 16762018657.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 73451298361 + 2229728400 = 271019^2 + 47220^2 .

It is an emirp because it is prime and its reverse (16762018657) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75681026761 is a prime.

It is a super-2 number, since 2×75681026761² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75681027761) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37840513380 + 37840513381.

It is an arithmetic number, because the mean of its divisors is an integer number (37840513381).

Almost surely, 2^75681026761 is an apocalyptic number.

It is an amenable number.

75681026761 is a deficient number, since it is larger than the sum of its proper divisors (1).

75681026761 is an equidigital number, since it uses as much as digits as its factorization.

75681026761 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 846720, while the sum is 49.

The spelling of 75681026761 in words is "seventy-five billion, six hundred eighty-one million, twenty-six thousand, seven hundred sixty-one".