221964332446 has 16 divisors (see below), whose sum is σ = 361129920480. Its totient is φ = 101906149120.

The previous prime is 221964332431. The next prime is 221964332461. The reversal of 221964332446 is 644233469122.

It is an interprime number because it is at equal distance from previous prime (221964332431) and next prime (221964332461).

It is a junction number, because it is equal to n+sod(n) for n = 221964332396 and 221964332405.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 79612786 + ... + 79615573.

It is an arithmetic number, because the mean of its divisors is an integer number (22570620030).

Almost surely, 2^221964332446 is an apocalyptic number.

221964332446 is a deficient number, since it is larger than the sum of its proper divisors (139165588034).

221964332446 is a wasteful number, since it uses less digits than its factorization.

221964332446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 159228419.

The product of its digits is 1492992, while the sum is 46.

The spelling of 221964332446 in words is "two hundred twenty-one billion, nine hundred sixty-four million, three hundred thirty-two thousand, four hundred forty-six".