21562056140179 has 2 divisors, whose sum is σ = 21562056140180. Its totient is φ = 21562056140178.

The previous prime is 21562056140137. The next prime is 21562056140249. The reversal of 21562056140179 is 97104165026512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 21562056140179 - 2⁹ = 21562056139667 is a prime.

It is not a weakly prime, because it can be changed into another prime (21562056140879) 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, 10781028070089 + 10781028070090.

It is an arithmetic number, because the mean of its divisors is an integer number (10781028070090).

Almost surely, 2^{21562056140179} is an apocalyptic number.

21562056140179 is a deficient number, since it is larger than the sum of its proper divisors (1).

21562056140179 is an equidigital number, since it uses as much as digits as its factorization.

21562056140179 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 49.

The spelling of 21562056140179 in words is "twenty-one trillion, five hundred sixty-two billion, fifty-six million, one hundred forty thousand, one hundred seventy-nine".