16774253315642 has 4 divisors (see below), whose sum is σ = 25161379973466. Its totient is φ = 8387126657820.

The previous prime is 16774253315593. The next prime is 16774253315647. The reversal of 16774253315642 is 24651335247761.

It is a happy number.

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

It can be written as a sum of positive squares in only one way, i.e., 8797577177041 + 7976676138601 = 2966071^2 + 2824301^2 .

It is not an unprimeable number, because it can be changed into a prime (16774253315647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4193563328909 + ... + 4193563328912.

Almost surely, 2^{16774253315642} is an apocalyptic number.

16774253315642 is a deficient number, since it is larger than the sum of its proper divisors (8387126657824).

16774253315642 is an equidigital number, since it uses as much as digits as its factorization.

16774253315642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8387126657823.

The product of its digits is 25401600, while the sum is 56.

The spelling of 16774253315642 in words is "sixteen trillion, seven hundred seventy-four billion, two hundred fifty-three million, three hundred fifteen thousand, six hundred forty-two".