41481061561 has 3 divisors (see below), whose sum is σ = 41481265231. Its totient is φ = 41480857892.

The previous prime is 41481061549. The next prime is 41481061571. The reversal of 41481061561 is 16516018414.

The square root of 41481061561 is 203669.

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

41481061561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 27599509161 + 13881552400 = 166131^2 + 117820^2 .

It is not a de Polignac number, because 41481061561 - 2¹¹ = 41481059513 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 41481061561.

It is not an unprimeable number, because it can be changed into a prime (41481061541) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 101835 + ... + 305503.

Almost surely, 2^41481061561 is an apocalyptic number.

41481061561 is the 203669-th square number.

41481061561 is the 101835-th centered octagonal number.

It is an amenable number.

41481061561 is a deficient number, since it is larger than the sum of its proper divisors (203670).

41481061561 is an frugal number, since it uses more digits than its factorization.

41481061561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 407338 (or 203669 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 37.

Adding to 41481061561 its reverse (16516018414), we get a palindrome (57997079975).

The spelling of 41481061561 in words is "forty-one billion, four hundred eighty-one million, sixty-one thousand, five hundred sixty-one".