16981746419 has 4 divisors (see below), whose sum is σ = 18525541560. Its totient is φ = 15437951280.

The previous prime is 16981746409. The next prime is 16981746421. The reversal of 16981746419 is 91464718961.

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 16981746419 - 2⁸ = 16981746163 is a prime.

It is a super-2 number, since 2×16981746419² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16981746409) 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, 771897554 + ... + 771897575.

It is an arithmetic number, because the mean of its divisors is an integer number (4631385390).

Almost surely, 2^16981746419 is an apocalyptic number.

16981746419 is a deficient number, since it is larger than the sum of its proper divisors (1543795141).

16981746419 is a wasteful number, since it uses less digits than its factorization.

16981746419 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1543795140.

The product of its digits is 2612736, while the sum is 56.

The spelling of 16981746419 in words is "sixteen billion, nine hundred eighty-one million, seven hundred forty-six thousand, four hundred nineteen".