15624544542641 has 2 divisors, whose sum is σ = 15624544542642. Its totient is φ = 15624544542640.

The previous prime is 15624544542589. The next prime is 15624544542743. The reversal of 15624544542641 is 14624544542651.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11028237332641 + 4596307210000 = 3320879^2 + 2143900^2 .

It is a cyclic number.

It is not a de Polignac number, because 15624544542641 - 2²² = 15624540348337 is a prime.

It is not a weakly prime, because it can be changed into another prime (15624544572641) 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, 7812272271320 + 7812272271321.

It is an arithmetic number, because the mean of its divisors is an integer number (7812272271321).

Almost surely, 2^{15624544542641} is an apocalyptic number.

It is an amenable number.

15624544542641 is a deficient number, since it is larger than the sum of its proper divisors (1).

15624544542641 is an equidigital number, since it uses as much as digits as its factorization.

15624544542641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432000, while the sum is 53.

The spelling of 15624544542641 in words is "fifteen trillion, six hundred twenty-four billion, five hundred forty-four million, five hundred forty-two thousand, six hundred forty-one".