16840178972 has 6 divisors (see below), whose sum is σ = 29470313208. Its totient is φ = 8420089484.

The previous prime is 16840178963. The next prime is 16840179023. The reversal of 16840178972 is 27987104861.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 2105022368 + ... + 2105022375.

It is an arithmetic number, because the mean of its divisors is an integer number (4911718868).

Almost surely, 2^16840178972 is an apocalyptic number.

It is an amenable number.

16840178972 is a deficient number, since it is larger than the sum of its proper divisors (12630134236).

16840178972 is a wasteful number, since it uses less digits than its factorization.

16840178972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4210044747 (or 4210044745 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 16840178972 in words is "sixteen billion, eight hundred forty million, one hundred seventy-eight thousand, nine hundred seventy-two".