41561816513 has 12 divisors (see below), whose sum is σ = 50892021360. Its totient is φ = 33749444232.

The previous prime is 41561816509. The next prime is 41561816519. The reversal of 41561816513 is 31561816514.

It is not a de Polignac number, because 41561816513 - 2² = 41561816509 is a prime.

It is not an unprimeable number, because it can be changed into a prime (41561816519) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22320131 + ... + 22321992.

It is an arithmetic number, because the mean of its divisors is an integer number (4241001780).

Almost surely, 2^41561816513 is an apocalyptic number.

It is an amenable number.

41561816513 is a deficient number, since it is larger than the sum of its proper divisors (9330204847).

41561816513 is a wasteful number, since it uses less digits than its factorization.

41561816513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44642156 (or 44642149 counting only the distinct ones).

The product of its digits is 86400, while the sum is 41.

Subtracting from 41561816513 its reverse (31561816514), we obtain a palindrome (9999999999).

The spelling of 41561816513 in words is "forty-one billion, five hundred sixty-one million, eight hundred sixteen thousand, five hundred thirteen".