16071550507021 has 2 divisors, whose sum is σ = 16071550507022. Its totient is φ = 16071550507020.

The previous prime is 16071550507013. The next prime is 16071550507057. The reversal of 16071550507021 is 12070505517061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 9237435669225 + 6834114837796 = 3039315^2 + 2614214^2 .

It is a cyclic number.

It is not a de Polignac number, because 16071550507021 - 2³ = 16071550507013 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16071550507321) 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, 8035775253510 + 8035775253511.

It is an arithmetic number, because the mean of its divisors is an integer number (8035775253511).

Almost surely, 2^{16071550507021} is an apocalyptic number.

It is an amenable number.

16071550507021 is a deficient number, since it is larger than the sum of its proper divisors (1).

16071550507021 is an equidigital number, since it uses as much as digits as its factorization.

16071550507021 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 73500, while the sum is 40.

The spelling of 16071550507021 in words is "sixteen trillion, seventy-one billion, five hundred fifty million, five hundred seven thousand, twenty-one".