816370418434 has 4 divisors (see below), whose sum is σ = 1224555627654. Its totient is φ = 408185209216.

The previous prime is 816370418377. The next prime is 816370418449. The reversal of 816370418434 is 434814073618.

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., 704080419025 + 112289999409 = 839095^2 + 335097^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204092604607 + ... + 204092604610.

Almost surely, 2^816370418434 is an apocalyptic number.

816370418434 is a deficient number, since it is larger than the sum of its proper divisors (408185209220).

816370418434 is a wasteful number, since it uses less digits than its factorization.

816370418434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408185209219.

The product of its (nonzero) digits is 1548288, while the sum is 49.

The spelling of 816370418434 in words is "eight hundred sixteen billion, three hundred seventy million, four hundred eighteen thousand, four hundred thirty-four".