816437734618 has 16 divisors (see below), whose sum is σ = 1337502063456. Its totient is φ = 370687771440.

The previous prime is 816437734601. The next prime is 816437734643.

816437734618 is nontrivially palindromic in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20994621 + ... + 21033472.

It is an arithmetic number, because the mean of its divisors is an integer number (83593878966).

Almost surely, 2^816437734618 is an apocalyptic number.

816437734618 is a deficient number, since it is larger than the sum of its proper divisors (521064328838).

816437734618 is a wasteful number, since it uses less digits than its factorization.

816437734618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42028989.

The product of its digits is 16257024, while the sum is 58.

The spelling of 816437734618 in words is "eight hundred sixteen billion, four hundred thirty-seven million, seven hundred thirty-four thousand, six hundred eighteen".