16044639272591 has 2 divisors, whose sum is σ = 16044639272592. Its totient is φ = 16044639272590.

The previous prime is 16044639272461. The next prime is 16044639272603. The reversal of 16044639272591 is 19527293644061.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 16044639272591 - 2²⁶ = 16044572163727 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 16044639272591.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16044639272891) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8022319636295 + 8022319636296.

It is an arithmetic number, because the mean of its divisors is an integer number (8022319636296).

Almost surely, 2^{16044639272591} is an apocalyptic number.

16044639272591 is a deficient number, since it is larger than the sum of its proper divisors (1).

16044639272591 is an equidigital number, since it uses as much as digits as its factorization.

16044639272591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19595520, while the sum is 59.

The spelling of 16044639272591 in words is "sixteen trillion, forty-four billion, six hundred thirty-nine million, two hundred seventy-two thousand, five hundred ninety-one".