16913621471 has 4 divisors (see below), whose sum is σ = 16914402792. Its totient is φ = 16912840152.

The previous prime is 16913621441. The next prime is 16913621479. The reversal of 16913621471 is 17412631961.

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

It is a cyclic number.

It is not a de Polignac number, because 16913621471 - 2²² = 16909427167 is a prime.

It is a super-3 number, since 3×16913621471³ (a number of 32 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16913621479) 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, 357236 + ... + 401801.

It is an arithmetic number, because the mean of its divisors is an integer number (4228600698).

Almost surely, 2^16913621471 is an apocalyptic number.

16913621471 is a deficient number, since it is larger than the sum of its proper divisors (781321).

16913621471 is an equidigital number, since it uses as much as digits as its factorization.

16913621471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781320.

The product of its digits is 54432, while the sum is 41.

The spelling of 16913621471 in words is "sixteen billion, nine hundred thirteen million, six hundred twenty-one thousand, four hundred seventy-one".