7664125504081 has 2 divisors, whose sum is σ = 7664125504082. Its totient is φ = 7664125504080.

The previous prime is 7664125504043. The next prime is 7664125504117. The reversal of 7664125504081 is 1804055214667.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7652443353025 + 11682151056 = 2766305^2 + 108084^2 .

It is an emirp because it is prime and its reverse (1804055214667) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 7664125504081 - 2⁹ = 7664125503569 is a prime.

It is a super-2 number, since 2×7664125504081² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (7664125504001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3832062752040 + 3832062752041.

It is an arithmetic number, because the mean of its divisors is an integer number (3832062752041).

Almost surely, 2^{7664125504081} is an apocalyptic number.

It is an amenable number.

7664125504081 is a deficient number, since it is larger than the sum of its proper divisors (1).

7664125504081 is an equidigital number, since it uses as much as digits as its factorization.

7664125504081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1612800, while the sum is 49.

The spelling of 7664125504081 in words is "seven trillion, six hundred sixty-four billion, one hundred twenty-five million, five hundred four thousand, eighty-one".