16944637477 has 4 divisors (see below), whose sum is σ = 17941380876. Its totient is φ = 15947894080.

The previous prime is 16944637471. The next prime is 16944637483. The reversal of 16944637477 is 77473644961.

It is a semiprime because it is the product of two primes.

It is an interprime number because it is at equal distance from previous prime (16944637471) and next prime (16944637483).

It can be written as a sum of positive squares in 2 ways, for example, as 14864730241 + 2079907236 = 121921^2 + 45606^2 .

It is a cyclic number.

It is not a de Polignac number, because 16944637477 - 2¹¹ = 16944635429 is a prime.

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16944637471) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 498371674 + ... + 498371707.

It is an arithmetic number, because the mean of its divisors is an integer number (4485345219).

Almost surely, 2^16944637477 is an apocalyptic number.

16944637477 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

16944637477 is a deficient number, since it is larger than the sum of its proper divisors (996743399).

16944637477 is an equidigital number, since it uses as much as digits as its factorization.

16944637477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 996743398.

The product of its digits is 21337344, while the sum is 58.

The spelling of 16944637477 in words is "sixteen billion, nine hundred forty-four million, six hundred thirty-seven thousand, four hundred seventy-seven".