16044639272461 has 2 divisors, whose sum is σ = 16044639272462. Its totient is φ = 16044639272460.

The previous prime is 16044639272437. The next prime is 16044639272591. The reversal of 16044639272461 is 16427293644061.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11387459469961 + 4657179802500 = 3374531^2 + 2158050^2 .

It is a cyclic number.

It is not a de Polignac number, because 16044639272461 - 2¹⁵ = 16044639239693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (16044639275461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8022319636230 + 8022319636231.

It is an arithmetic number, because the mean of its divisors is an integer number (8022319636231).

Almost surely, 2^{16044639272461} is an apocalyptic number.

It is an amenable number.

16044639272461 is a deficient number, since it is larger than the sum of its proper divisors (1).

16044639272461 is an equidigital number, since it uses as much as digits as its factorization.

16044639272461 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10450944, while the sum is 55.

The spelling of 16044639272461 in words is "sixteen trillion, forty-four billion, six hundred thirty-nine million, two hundred seventy-two thousand, four hundred sixty-one".