221623612411640 has 32 divisors (see below), whose sum is σ = 498655976686560. Its totient is φ = 88648938518400.

The previous prime is 221623612411639. The next prime is 221623612411667. The reversal of 221623612411640 is 46114216326122.

It is a congruent number.

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, 8697596 + ... + 22779275.

It is an arithmetic number, because the mean of its divisors is an integer number (15582999271455).

Almost surely, 2^{221623612411640} is an apocalyptic number.

221623612411640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221623612411640 is an abundant number, since it is smaller than the sum of its proper divisors (277032364274920).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221623612411640 is a wasteful number, since it uses less digits than its factorization.

221623612411640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31652903 (or 31652899 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

Adding to 221623612411640 its reverse (46114216326122), we get a palindrome (267737828737762).

The spelling of 221623612411640 in words is "two hundred twenty-one trillion, six hundred twenty-three billion, six hundred twelve million, four hundred eleven thousand, six hundred forty".