75806644531 has 2 divisors, whose sum is σ = 75806644532. Its totient is φ = 75806644530.

The previous prime is 75806644523. The next prime is 75806644559. The reversal of 75806644531 is 13544660857.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 75806644531 - 2³ = 75806644523 is a prime.

It is a super-2 number, since 2×75806644531² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (75806644631) 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, 37903322265 + 37903322266.

It is an arithmetic number, because the mean of its divisors is an integer number (37903322266).

Almost surely, 2^75806644531 is an apocalyptic number.

75806644531 is a deficient number, since it is larger than the sum of its proper divisors (1).

75806644531 is an equidigital number, since it uses as much as digits as its factorization.

75806644531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2419200, while the sum is 49.

The spelling of 75806644531 in words is "seventy-five billion, eight hundred six million, six hundred forty-four thousand, five hundred thirty-one".