221646325766740 has 48 divisors (see below), whose sum is σ = 531953674221312. Its totient is φ = 75992669922816.

The previous prime is 221646325766737. The next prime is 221646325766809. The reversal of 221646325766740 is 47667523646122.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27194497 + ... + 34392343.

It is an arithmetic number, because the mean of its divisors is an integer number (11082368212944).

Almost surely, 2^{221646325766740} is an apocalyptic number.

221646325766740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221646325766740 is an abundant number, since it is smaller than the sum of its proper divisors (310307348454572).

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

221646325766740 is a wasteful number, since it uses less digits than its factorization.

221646325766740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7417816 (or 7417814 counting only the distinct ones).

The product of its (nonzero) digits is 121927680, while the sum is 61.

The spelling of 221646325766740 in words is "two hundred twenty-one trillion, six hundred forty-six billion, three hundred twenty-five million, seven hundred sixty-six thousand, seven hundred forty".