16904538513 has 8 divisors (see below), whose sum is σ = 25043760800. Its totient is φ = 11269692324.

The previous prime is 16904538493. The next prime is 16904538517. The reversal of 16904538513 is 31583540961.

16904538513 is a `hidden beast` number, since 1 + 6 + 90 + 45 + 3 + 8 + 513 = 666.

It is not a de Polignac number, because 16904538513 - 2⁶ = 16904538449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16904538517) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 313046983 + ... + 313047036.

It is an arithmetic number, because the mean of its divisors is an integer number (3130470100).

Almost surely, 2^16904538513 is an apocalyptic number.

It is an amenable number.

16904538513 is a deficient number, since it is larger than the sum of its proper divisors (8139222287).

16904538513 is an equidigital number, since it uses as much as digits as its factorization.

16904538513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 626094028 (or 626094022 counting only the distinct ones).

The product of its (nonzero) digits is 388800, while the sum is 45.

The spelling of 16904538513 in words is "sixteen billion, nine hundred four million, five hundred thirty-eight thousand, five hundred thirteen".