221744206542480 has 160 divisors (see below), whose sum is σ = 727903709359488. Its totient is φ = 55648786636800.

The previous prime is 221744206542461. The next prime is 221744206542491. The reversal of 221744206542480 is 84245602447122.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 46571650 + ... + 51111710.

Almost surely, 2^{221744206542480} is an apocalyptic number.

221744206542480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 221744206542480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363951854679744).

221744206542480 is an abundant number, since it is smaller than the sum of its proper divisors (506159502817008).

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

221744206542480 is a wasteful number, since it uses less digits than its factorization.

221744206542480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4552065 (or 4552059 counting only the distinct ones).

The product of its (nonzero) digits is 6881280, while the sum is 51.

The spelling of 221744206542480 in words is "two hundred twenty-one trillion, seven hundred forty-four billion, two hundred six million, five hundred forty-two thousand, four hundred eighty".