16215768746 has 4 divisors (see below), whose sum is σ = 24323653122. Its totient is φ = 8107884372.

The previous prime is 16215768721. The next prime is 16215768749. The reversal of 16215768746 is 64786751261.

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., 10738140625 + 5477628121 = 103625^2 + 74011^2 .

It is not an unprimeable number, because it can be changed into a prime (16215768749) by changing a digit.

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, 4053942185 + ... + 4053942188.

Almost surely, 2^16215768746 is an apocalyptic number.

16215768746 is a deficient number, since it is larger than the sum of its proper divisors (8107884376).

16215768746 is an equidigital number, since it uses as much as digits as its factorization.

16215768746 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8107884375.

The product of its digits is 3386880, while the sum is 53.

The spelling of 16215768746 in words is "sixteen billion, two hundred fifteen million, seven hundred sixty-eight thousand, seven hundred forty-six".