41515085561 has 4 divisors (see below), whose sum is σ = 41522561892. Its totient is φ = 41507609232.

The previous prime is 41515085461. The next prime is 41515085567. The reversal of 41515085561 is 16558051514.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17731585600 + 23783499961 = 133160^2 + 154219^2 .

It is a cyclic number.

It is not a de Polignac number, because 41515085561 - 2¹⁴ = 41515069177 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41515085567) 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, 3729830 + ... + 3740943.

It is an arithmetic number, because the mean of its divisors is an integer number (10380640473).

Almost surely, 2^41515085561 is an apocalyptic number.

It is an amenable number.

41515085561 is a deficient number, since it is larger than the sum of its proper divisors (7476331).

41515085561 is an equidigital number, since it uses as much as digits as its factorization.

41515085561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7476330.

The product of its (nonzero) digits is 120000, while the sum is 41.

The spelling of 41515085561 in words is "forty-one billion, five hundred fifteen million, eighty-five thousand, five hundred sixty-one".