16653334491 has 24 divisors (see below), whose sum is σ = 25332063120. Its totient is φ = 10513241856.

The previous prime is 16653334427. The next prime is 16653334499. The reversal of 16653334491 is 19443335661.

It is a happy number.

It is not a de Polignac number, because 16653334491 - 2⁶ = 16653334427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (16653334499) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 388855 + ... + 429551.

It is an arithmetic number, because the mean of its divisors is an integer number (1055502630).

Almost surely, 2^16653334491 is an apocalyptic number.

16653334491 is a deficient number, since it is larger than the sum of its proper divisors (8678728629).

16653334491 is a wasteful number, since it uses less digits than its factorization.

16653334491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43115 (or 43112 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The spelling of 16653334491 in words is "sixteen billion, six hundred fifty-three million, three hundred thirty-four thousand, four hundred ninety-one".