41291637521 has 2 divisors, whose sum is σ = 41291637522. Its totient is φ = 41291637520.

The previous prime is 41291637461. The next prime is 41291637523. The reversal of 41291637521 is 12573619214.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 37233947521 + 4057690000 = 192961^2 + 63700^2 .

It is a cyclic number.

It is not a de Polignac number, because 41291637521 - 2³⁴ = 24111768337 is a prime.

Together with 41291637523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (41291637523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20645818760 + 20645818761.

It is an arithmetic number, because the mean of its divisors is an integer number (20645818761).

Almost surely, 2^41291637521 is an apocalyptic number.

It is an amenable number.

41291637521 is a deficient number, since it is larger than the sum of its proper divisors (1).

41291637521 is an equidigital number, since it uses as much as digits as its factorization.

41291637521 is an evil number, because the sum of its binary digits is even.

The product of its digits is 90720, while the sum is 41.

The spelling of 41291637521 in words is "forty-one billion, two hundred ninety-one million, six hundred thirty-seven thousand, five hundred twenty-one".