201261035406 has 16 divisors (see below), whose sum is σ = 423707443200. Its totient is φ = 63556116408.

The previous prime is 201261035401. The next prime is 201261035407. The reversal of 201261035406 is 604530162102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201261035401) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 882723726 + ... + 882723953.

It is an arithmetic number, because the mean of its divisors is an integer number (26481715200).

Almost surely, 2^201261035406 is an apocalyptic number.

201261035406 is an abundant number, since it is smaller than the sum of its proper divisors (222446407794).

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

201261035406 is a wasteful number, since it uses less digits than its factorization.

201261035406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1765447703.

The product of its (nonzero) digits is 8640, while the sum is 30.

Adding to 201261035406 its reverse (604530162102), we get a palindrome (805791197508).

The spelling of 201261035406 in words is "two hundred one billion, two hundred sixty-one million, thirty-five thousand, four hundred six".