16645243078 has 8 divisors (see below), whose sum is σ = 24986683872. Its totient is φ = 8316348456.

The previous prime is 16645243061. The next prime is 16645243081. The reversal of 16645243078 is 87034254661.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3133225 + ... + 3138532.

It is an arithmetic number, because the mean of its divisors is an integer number (3123335484).

Almost surely, 2^16645243078 is an apocalyptic number.

16645243078 is a deficient number, since it is larger than the sum of its proper divisors (8341440794).

16645243078 is a wasteful number, since it uses less digits than its factorization.

16645243078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6273086.

The product of its (nonzero) digits is 967680, while the sum is 46.

The spelling of 16645243078 in words is "sixteen billion, six hundred forty-five million, two hundred forty-three thousand, seventy-eight".