202130745661 has 16 divisors (see below), whose sum is σ = 222343027200. Its totient is φ = 182585870208.

The previous prime is 202130745589. The next prime is 202130745683. The reversal of 202130745661 is 166547031202.

It is a cyclic number.

It is not a de Polignac number, because 202130745661 - 2²³ = 202122357053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 202130745661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202130755661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5069160 + ... + 5108878.

It is an arithmetic number, because the mean of its divisors is an integer number (13896439200).

Almost surely, 2^202130745661 is an apocalyptic number.

It is an amenable number.

202130745661 is a deficient number, since it is larger than the sum of its proper divisors (20212281539).

202130745661 is a wasteful number, since it uses less digits than its factorization.

202130745661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48108.

The product of its (nonzero) digits is 60480, while the sum is 37.

Adding to 202130745661 its reverse (166547031202), we get a palindrome (368677776863).

The spelling of 202130745661 in words is "two hundred two billion, one hundred thirty million, seven hundred forty-five thousand, six hundred sixty-one".