140556605521 has 2 divisors, whose sum is σ = 140556605522. Its totient is φ = 140556605520.

The previous prime is 140556605513. The next prime is 140556605533. The reversal of 140556605521 is 125506655041.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 112117155921 + 28439449600 = 334839^2 + 168640^2 .

It is an emirp because it is prime and its reverse (125506655041) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 140556605521 - 2³ = 140556605513 is a prime.

It is not a weakly prime, because it can be changed into another prime (140556605551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 70278302760 + 70278302761.

It is an arithmetic number, because the mean of its divisors is an integer number (70278302761).

Almost surely, 2^140556605521 is an apocalyptic number.

It is an amenable number.

140556605521 is a deficient number, since it is larger than the sum of its proper divisors (1).

140556605521 is an equidigital number, since it uses as much as digits as its factorization.

140556605521 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 180000, while the sum is 40.

The spelling of 140556605521 in words is "one hundred forty billion, five hundred fifty-six million, six hundred five thousand, five hundred twenty-one".