201636630722 has 18 divisors (see below), whose sum is σ = 304641425529. Its totient is φ = 100094689560.

The previous prime is 201636630721. The next prime is 201636630763. The reversal of 201636630722 is 227036636102.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 165666094441 + 35970536281 = 407021^2 + 189659^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=317519.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (201636630721) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 94619597 + ... + 94621727.

Almost surely, 2^201636630722 is an apocalyptic number.

201636630722 is a deficient number, since it is larger than the sum of its proper divisors (103004794807).

201636630722 is an frugal number, since it uses more digits than its factorization.

201636630722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4562 (or 2282 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 38.

The spelling of 201636630722 in words is "two hundred one billion, six hundred thirty-six million, six hundred thirty thousand, seven hundred twenty-two".