41011506561 has 4 divisors (see below), whose sum is σ = 54682008752. Its totient is φ = 27341004372.

The previous prime is 41011506541. The next prime is 41011506577. The reversal of 41011506561 is 16560511014.

41011506561 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 Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 41011506561 - 2¹⁵ = 41011473793 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (41011506541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6835251091 + ... + 6835251096.

It is an arithmetic number, because the mean of its divisors is an integer number (13670502188).

Almost surely, 2^41011506561 is an apocalyptic number.

It is an amenable number.

41011506561 is a deficient number, since it is larger than the sum of its proper divisors (13670502191).

41011506561 is a wasteful number, since it uses less digits than its factorization.

41011506561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13670502190.

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

The spelling of 41011506561 in words is "forty-one billion, eleven million, five hundred six thousand, five hundred sixty-one".