163421296516 has 9 divisors (see below), whose sum is σ = 285988683799. Its totient is φ = 81710244004.

The previous prime is 163421296477. The next prime is 163421296529. The reversal of 163421296516 is 615692124361.

The square root of 163421296516 is 404254.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 707445 + ... + 909571.

Almost surely, 2^163421296516 is an apocalyptic number.

163421296516 is the 404254-th square number.

It is an amenable number.

163421296516 is a deficient number, since it is larger than the sum of its proper divisors (122567387283).

163421296516 is an frugal number, since it uses more digits than its factorization.

163421296516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404258 (or 202129 counting only the distinct ones).

The product of its digits is 466560, while the sum is 46.

The spelling of 163421296516 in words is "one hundred sixty-three billion, four hundred twenty-one million, two hundred ninety-six thousand, five hundred sixteen".