221264486805 has 16 divisors (see below), whose sum is σ = 363591373824. Its totient is φ = 114818328000.

The previous prime is 221264486789. The next prime is 221264486813. The reversal of 221264486805 is 508684462122.

It is not a de Polignac number, because 221264486805 - 2⁴ = 221264486789 is a prime.

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, 199336821 + ... + 199337930.

It is an arithmetic number, because the mean of its divisors is an integer number (22724460864).

Almost surely, 2^221264486805 is an apocalyptic number.

It is an amenable number.

221264486805 is a deficient number, since it is larger than the sum of its proper divisors (142326887019).

221264486805 is a wasteful number, since it uses less digits than its factorization.

221264486805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398674796.

The product of its (nonzero) digits is 1474560, while the sum is 48.

The spelling of 221264486805 in words is "two hundred twenty-one billion, two hundred sixty-four million, four hundred eighty-six thousand, eight hundred five".