201420981905796 has 27 divisors (see below), whose sum is σ = 509147697289413. Its totient is φ = 67140298917360.

The previous prime is 201420981905779. The next prime is 201420981905821. The reversal of 201420981905796 is 697509189024102.

The square root of 201420981905796 is 14192286.

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

201420981905796 is a `hidden beast` number, since 2 + 0 + 1 + 42 + 0 + 9 + 8 + 19 + 0 + 579 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 134504001027396 + 66916980878400 = 11597586^2 + 8180280^2 .

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 8 ways as a sum of consecutive naturals, for example, 83971026 + ... + 86336406.

Almost surely, 2^{201420981905796} is an apocalyptic number.

201420981905796 is the 14192286-th square number.

It is an amenable number.

201420981905796 is an abundant number, since it is smaller than the sum of its proper divisors (307726715383617).

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

201420981905796 is an frugal number, since it uses more digits than its factorization.

201420981905796 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4730772 (or 2365386 counting only the distinct ones).

The product of its (nonzero) digits is 19595520, while the sum is 63.

The spelling of 201420981905796 in words is "two hundred one trillion, four hundred twenty billion, nine hundred eighty-one million, nine hundred five thousand, seven hundred ninety-six".