216144406601 has 4 divisors (see below), whose sum is σ = 221171020752. Its totient is φ = 211117792452.

The previous prime is 216144406589. The next prime is 216144406651. The reversal of 216144406601 is 106604441612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216144406601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216144406651) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2513307011 + ... + 2513307096.

It is an arithmetic number, because the mean of its divisors is an integer number (55292755188).

Almost surely, 2^216144406601 is an apocalyptic number.

It is an amenable number.

216144406601 is a deficient number, since it is larger than the sum of its proper divisors (5026614151).

216144406601 is an equidigital number, since it uses as much as digits as its factorization.

216144406601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5026614150.

The product of its (nonzero) digits is 27648, while the sum is 35.

The spelling of 216144406601 in words is "two hundred sixteen billion, one hundred forty-four million, four hundred six thousand, six hundred one".