16945471619 has 4 divisors (see below), whose sum is σ = 17043422496. Its totient is φ = 16847520744.

The previous prime is 16945471601. The next prime is 16945471649. The reversal of 16945471619 is 91617454961.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 91617454961 = 23 ⋅3983367607.

It is a cyclic number.

It is not a de Polignac number, because 16945471619 - 2⁸ = 16945471363 is a prime.

It is a super-2 number, since 2×16945471619² (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 (16945471649) 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, 48975179 + ... + 48975524.

It is an arithmetic number, because the mean of its divisors is an integer number (4260855624).

Almost surely, 2^16945471619 is an apocalyptic number.

16945471619 is a deficient number, since it is larger than the sum of its proper divisors (97950877).

16945471619 is an equidigital number, since it uses as much as digits as its factorization.

16945471619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97950876.

The product of its digits is 1632960, while the sum is 53.

The spelling of 16945471619 in words is "sixteen billion, nine hundred forty-five million, four hundred seventy-one thousand, six hundred nineteen".