201220427776 has 117 divisors (see below), whose sum is σ = 414510215679. Its totient is φ = 97667555328.

The previous prime is 201220427711. The next prime is 201220427809. The reversal of 201220427776 is 677724022102.

The square root of 201220427776 is 448576.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1234481071 + ... + 1234481233.

Almost surely, 2^201220427776 is an apocalyptic number.

201220427776 is the 448576-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 201220427776

201220427776 is an abundant number, since it is smaller than the sum of its proper divisors (213289787903).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

201220427776 is an frugal number, since it uses more digits than its factorization.

201220427776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 436 (or 208 counting only the distinct ones).

The product of its (nonzero) digits is 131712, while the sum is 40.

Adding to 201220427776 its reverse (677724022102), we get a palindrome (878944449878).

The spelling of 201220427776 in words is "two hundred one billion, two hundred twenty million, four hundred twenty-seven thousand, seven hundred seventy-six".