201561110652 has 48 divisors (see below), whose sum is σ = 540068054400. Its totient is φ = 57864432960.

The previous prime is 201561110617. The next prime is 201561110677. The reversal of 201561110652 is 256011165102.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 40181127 + ... + 40186142.

It is an arithmetic number, because the mean of its divisors is an integer number (11251417800).

Almost surely, 2^201561110652 is an apocalyptic number.

201561110652 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

201561110652 is an abundant number, since it is smaller than the sum of its proper divisors (338506943748).

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

201561110652 is a wasteful number, since it uses less digits than its factorization.

201561110652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80367306 (or 80367304 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 30.

Adding to 201561110652 its reverse (256011165102), we get a palindrome (457572275754).

It can be divided in two parts, 201561 and 110652, that added together give a palindrome (312213).

The spelling of 201561110652 in words is "two hundred one billion, five hundred sixty-one million, one hundred ten thousand, six hundred fifty-two".