16394979874 has 48 divisors (see below), whose sum is σ = 31179532608. Its totient is φ = 6407741088.

The previous prime is 16394979869. The next prime is 16394979883. The reversal of 16394979874 is 47897949361.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28219 + ... + 183265.

It is an arithmetic number, because the mean of its divisors is an integer number (649573596).

Almost surely, 2^16394979874 is an apocalyptic number.

16394979874 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

16394979874 is a deficient number, since it is larger than the sum of its proper divisors (14784552734).

16394979874 is a wasteful number, since it uses less digits than its factorization.

16394979874 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155159 (or 155152 counting only the distinct ones).

The product of its digits is 82301184, while the sum is 67.

The spelling of 16394979874 in words is "sixteen billion, three hundred ninety-four million, nine hundred seventy-nine thousand, eight hundred seventy-four".