52645309529081 has 2 divisors, whose sum is σ = 52645309529082. Its totient is φ = 52645309529080.

The previous prime is 52645309529077. The next prime is 52645309529089. The reversal of 52645309529081 is 18092590354625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52334503279081 + 310806250000 = 7234259^2 + 557500^2 .

It is a cyclic number.

It is not a de Polignac number, because 52645309529081 - 2² = 52645309529077 is a prime.

It is a super-2 number, since 2×52645309529081² (a number of 28 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 52645309529081.

It is not a weakly prime, because it can be changed into another prime (52645309529089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26322654764540 + 26322654764541.

It is an arithmetic number, because the mean of its divisors is an integer number (26322654764541).

Almost surely, 2^{52645309529081} is an apocalyptic number.

It is an amenable number.

52645309529081 is a deficient number, since it is larger than the sum of its proper divisors (1).

52645309529081 is an equidigital number, since it uses as much as digits as its factorization.

52645309529081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 23328000, while the sum is 59.

The spelling of 52645309529081 in words is "fifty-two trillion, six hundred forty-five billion, three hundred nine million, five hundred twenty-nine thousand, eighty-one".