16991834451 has 8 divisors (see below), whose sum is σ = 22928740800. Its totient is φ = 11191408872.

The previous prime is 16991834413. The next prime is 16991834459. The reversal of 16991834451 is 15443819961.

It is a happy number.

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

It is not a de Polignac number, because 16991834451 - 2⁹ = 16991833939 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 16991834394 and 16991834403.

It is not an unprimeable number, because it can be changed into a prime (16991834459) 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, 34119901 + ... + 34120398.

It is an arithmetic number, because the mean of its divisors is an integer number (2866092600).

Almost surely, 2^16991834451 is an apocalyptic number.

16991834451 is a deficient number, since it is larger than the sum of its proper divisors (5936906349).

16991834451 is an equidigital number, since it uses as much as digits as its factorization.

16991834451 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68240385.

The product of its digits is 933120, while the sum is 51.

The spelling of 16991834451 in words is "sixteen billion, nine hundred ninety-one million, eight hundred thirty-four thousand, four hundred fifty-one".