41561525061557 has 4 divisors (see below), whose sum is σ = 41568154757580. Its totient is φ = 41554895365536.

The previous prime is 41561525061547. The next prime is 41561525061571. The reversal of 41561525061557 is 75516052516514.

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 28291431222961 + 13270093838596 = 5318969^2 + 3642814^2 .

It is a cyclic number.

It is not a de Polignac number, because 41561525061557 - 2¹² = 41561525057461 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 41561525061499 and 41561525061508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41561525061547) 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, 3314838608 + ... + 3314851145.

It is an arithmetic number, because the mean of its divisors is an integer number (10392038689395).

Almost surely, 2^{41561525061557} is an apocalyptic number.

It is an amenable number.

41561525061557 is a deficient number, since it is larger than the sum of its proper divisors (6629696023).

41561525061557 is an equidigital number, since it uses as much as digits as its factorization.

41561525061557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6629696022.

The product of its (nonzero) digits is 6300000, while the sum is 53.

The spelling of 41561525061557 in words is "forty-one trillion, five hundred sixty-one billion, five hundred twenty-five million, sixty-one thousand, five hundred fifty-seven".