16243487378 has 4 divisors (see below), whose sum is σ = 24365231070. Its totient is φ = 8121743688.

The previous prime is 16243487357. The next prime is 16243487389. The reversal of 16243487378 is 87378434261.

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., 11617175089 + 4626312289 = 107783^2 + 68017^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4060871843 + ... + 4060871846.

Almost surely, 2^16243487378 is an apocalyptic number.

16243487378 is a deficient number, since it is larger than the sum of its proper divisors (8121743692).

16243487378 is an equidigital number, since it uses as much as digits as its factorization.

16243487378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8121743691.

The product of its digits is 5419008, while the sum is 53.

The spelling of 16243487378 in words is "sixteen billion, two hundred forty-three million, four hundred eighty-seven thousand, three hundred seventy-eight".