16523947904 has 32 divisors (see below), whose sum is σ = 33288699600. Its totient is φ = 8169137152.

The previous prime is 16523947901. The next prime is 16523947907. The reversal of 16523947904 is 40974932561.

It is an interprime number because it is at equal distance from previous prime (16523947901) and next prime (16523947907).

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16523947901) 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 3 ways as a sum of consecutive naturals, for example, 713852 + ... + 736635.

Almost surely, 2^16523947904 is an apocalyptic number.

It is an amenable number.

16523947904 is an abundant number, since it is smaller than the sum of its proper divisors (16764751696).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16523947904 is an equidigital number, since it uses as much as digits as its factorization.

16523947904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1450590 (or 1450578 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 50.

The spelling of 16523947904 in words is "sixteen billion, five hundred twenty-three million, nine hundred forty-seven thousand, nine hundred four".