16742928385 has 4 divisors (see below), whose sum is σ = 20091514068. Its totient is φ = 13394342704.

The previous prime is 16742928347. The next prime is 16742928413. The reversal of 16742928385 is 58382924761.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12845048896 + 3897879489 = 113336^2 + 62433^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-16742928385 is a prime.

It is a Duffinian 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, 1674292834 + ... + 1674292843.

It is an arithmetic number, because the mean of its divisors is an integer number (5022878517).

Almost surely, 2^16742928385 is an apocalyptic number.

It is an amenable number.

16742928385 is a deficient number, since it is larger than the sum of its proper divisors (3348585683).

16742928385 is an equidigital number, since it uses as much as digits as its factorization.

16742928385 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3348585682.

The product of its digits is 5806080, while the sum is 55.

The spelling of 16742928385 in words is "sixteen billion, seven hundred forty-two million, nine hundred twenty-eight thousand, three hundred eighty-five".