221534424266646 has 8 divisors (see below), whose sum is σ = 443068848533304. Its totient is φ = 73844808088880.

The previous prime is 221534424266641. The next prime is 221534424266657. The reversal of 221534424266646 is 646662424435122.

221534424266646 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

221534424266646 is an admirable number.

It is a super-2 number, since 2×221534424266646² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221534424266641) 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, 18461202022215 + ... + 18461202022226.

It is an arithmetic number, because the mean of its divisors is an integer number (55383606066663).

Almost surely, 2^{221534424266646} is an apocalyptic number.

221534424266646 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

221534424266646 is a wasteful number, since it uses less digits than its factorization.

221534424266646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36922404044446.

The product of its digits is 79626240, while the sum is 57.

The spelling of 221534424266646 in words is "two hundred twenty-one trillion, five hundred thirty-four billion, four hundred twenty-four million, two hundred sixty-six thousand, six hundred forty-six".