16623647747 has 8 divisors (see below), whose sum is σ = 19115010816. Its totient is φ = 14161423752.

The previous prime is 16623647717. The next prime is 16623647771. The reversal of 16623647747 is 74774632661.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-16623647747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16623647717) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7283543 + ... + 7285824.

It is an arithmetic number, because the mean of its divisors is an integer number (2389376352).

Almost surely, 2^16623647747 is an apocalyptic number.

16623647747 is a deficient number, since it is larger than the sum of its proper divisors (2491363069).

16623647747 is a wasteful number, since it uses less digits than its factorization.

16623647747 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14569537.

The product of its digits is 7112448, while the sum is 53.

The spelling of 16623647747 in words is "sixteen billion, six hundred twenty-three million, six hundred forty-seven thousand, seven hundred forty-seven".