216179432401 has 3 divisors (see below), whose sum is σ = 216179897353. Its totient is φ = 216178967450.

The previous prime is 216179432393. The next prime is 216179432407. The reversal of 216179432401 is 104234971612.

The square root of 216179432401 is 464951.

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

216179432401 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 216179432401 - 2³ = 216179432393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216179432407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 232476 + ... + 697426.

Almost surely, 2^216179432401 is an apocalyptic number.

216179432401 is the 464951-st square number.

216179432401 is the 232476-th centered octagonal number.

It is an amenable number.

216179432401 is a deficient number, since it is larger than the sum of its proper divisors (464952).

216179432401 is an frugal number, since it uses more digits than its factorization.

216179432401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 929902 (or 464951 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 40.

The spelling of 216179432401 in words is "two hundred sixteen billion, one hundred seventy-nine million, four hundred thirty-two thousand, four hundred one".