221064075744 has 48 divisors (see below), whose sum is σ = 580825365120. Its totient is φ = 73620448640.

The previous prime is 221064075721. The next prime is 221064075769. The reversal of 221064075744 is 447570460122.

It is a tau number, because it is divible by the number of its divisors (48).

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 221064075696 and 221064075705.

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, 950604 + ... + 1160075.

It is an arithmetic number, because the mean of its divisors is an integer number (12100528440).

Almost surely, 2^221064075744 is an apocalyptic number.

221064075744 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

221064075744 is an abundant number, since it is smaller than the sum of its proper divisors (359761289376).

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

221064075744 is a wasteful number, since it uses less digits than its factorization.

221064075744 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2111783 (or 2111775 counting only the distinct ones).

The product of its (nonzero) digits is 376320, while the sum is 42.

The spelling of 221064075744 in words is "two hundred twenty-one billion, sixty-four million, seventy-five thousand, seven hundred forty-four".