816445342387 has 8 divisors (see below), whose sum is σ = 864494941536. Its totient is φ = 768398343552.

The previous prime is 816445342379. The next prime is 816445342403. The reversal of 816445342387 is 783243544618.

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

It is a cyclic number.

It is not a de Polignac number, because 816445342387 - 2³ = 816445342379 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (816445312387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15858 + ... + 1277944.

It is an arithmetic number, because the mean of its divisors is an integer number (108061867692).

Almost surely, 2^816445342387 is an apocalyptic number.

816445342387 is a deficient number, since it is larger than the sum of its proper divisors (48049599149).

816445342387 is a wasteful number, since it uses less digits than its factorization.

816445342387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1300157.

The product of its digits is 15482880, while the sum is 55.

The spelling of 816445342387 in words is "eight hundred sixteen billion, four hundred forty-five million, three hundred forty-two thousand, three hundred eighty-seven".