15645100073 has 2 divisors, whose sum is σ = 15645100074. Its totient is φ = 15645100072.

The previous prime is 15645099959. The next prime is 15645100109. The reversal of 15645100073 is 37000154651.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14973927424 + 671172649 = 122368^2 + 25907^2 .

It is a cyclic number.

It is not a de Polignac number, because 15645100073 - 2¹⁰ = 15645099049 is a prime.

It is not a weakly prime, because it can be changed into another prime (15645100673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7822550036 + 7822550037.

It is an arithmetic number, because the mean of its divisors is an integer number (7822550037).

Almost surely, 2^15645100073 is an apocalyptic number.

It is an amenable number.

15645100073 is a deficient number, since it is larger than the sum of its proper divisors (1).

15645100073 is an equidigital number, since it uses as much as digits as its factorization.

15645100073 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12600, while the sum is 32.

The spelling of 15645100073 in words is "fifteen billion, six hundred forty-five million, one hundred thousand, seventy-three".