221610660105646 has 16 divisors (see below), whose sum is σ = 379918502273376. Its totient is φ = 94972368807936.

The previous prime is 221610660105643. The next prime is 221610660105671. The reversal of 221610660105646 is 646501066016122.

It is a super-2 number, since 2×221610660105646² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 221610660105596 and 221610660105605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (221610660105643) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 301985451 + ... + 302718406.

It is an arithmetic number, because the mean of its divisors is an integer number (23744906392086).

Almost surely, 2^{221610660105646} is an apocalyptic number.

221610660105646 is a deficient number, since it is larger than the sum of its proper divisors (158307842167730).

221610660105646 is a wasteful number, since it uses less digits than its factorization.

221610660105646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 604730043.

The product of its (nonzero) digits is 622080, while the sum is 46.

The spelling of 221610660105646 in words is "two hundred twenty-one trillion, six hundred ten billion, six hundred sixty million, one hundred five thousand, six hundred forty-six".