221545356226636 has 12 divisors (see below), whose sum is σ = 417527786734912. Its totient is φ = 102251702873808.

The previous prime is 221545356226633. The next prime is 221545356226699. The reversal of 221545356226636 is 636622653545122.

It is not an unprimeable number, because it can be changed into a prime (221545356226633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2130243809820 + ... + 2130243809923.

Almost surely, 2^{221545356226636} is an apocalyptic number.

221545356226636 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

221545356226636 is a deficient number, since it is larger than the sum of its proper divisors (195982430508276).

221545356226636 is a wasteful number, since it uses less digits than its factorization.

221545356226636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4260487619760 (or 4260487619758 counting only the distinct ones).

The product of its digits is 93312000, while the sum is 58.

The spelling of 221545356226636 in words is "two hundred twenty-one trillion, five hundred forty-five billion, three hundred fifty-six million, two hundred twenty-six thousand, six hundred thirty-six".