41751157561 has 3 divisors (see below), whose sum is σ = 41751361893. Its totient is φ = 41750953230.

The previous prime is 41751157559. The next prime is 41751157571. The reversal of 41751157561 is 16575115714.

The square root of 41751157561 is 204331.

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

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 is not a de Polignac number, because 41751157561 - 2¹ = 41751157559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (41751157571) 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, 102166 + ... + 306496.

It is an arithmetic number, because the mean of its divisors is an integer number (13917120631).

Almost surely, 2^41751157561 is an apocalyptic number.

41751157561 is the 204331-st square number.

41751157561 is the 102166-th centered octagonal number.

It is an amenable number.

41751157561 is a deficient number, since it is larger than the sum of its proper divisors (204332).

41751157561 is an frugal number, since it uses more digits than its factorization.

41751157561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 408662 (or 204331 counting only the distinct ones).

The product of its digits is 147000, while the sum is 43.

The spelling of 41751157561 in words is "forty-one billion, seven hundred fifty-one million, one hundred fifty-seven thousand, five hundred sixty-one".