221656477115446 has 8 divisors (see below), whose sum is σ = 332639144251704. Its totient is φ = 110776762364880.

The previous prime is 221656477115321. The next prime is 221656477115537. The reversal of 221656477115446 is 644511774656122.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25738091040 + ... + 25738099651.

It is an arithmetic number, because the mean of its divisors is an integer number (41579893031463).

Almost surely, 2^{221656477115446} is an apocalyptic number.

221656477115446 is a deficient number, since it is larger than the sum of its proper divisors (110982667136258).

221656477115446 is a wasteful number, since it uses less digits than its factorization.

221656477115446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51476192846.

The product of its digits is 67737600, while the sum is 61.

The spelling of 221656477115446 in words is "two hundred twenty-one trillion, six hundred fifty-six billion, four hundred seventy-seven million, one hundred fifteen thousand, four hundred forty-six".