41015515621 has 2 divisors, whose sum is σ = 41015515622. Its totient is φ = 41015515620.

The previous prime is 41015515571. The next prime is 41015515627. The reversal of 41015515621 is 12651551014.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40527326596 + 488189025 = 201314^2 + 22095^2 .

It is a cyclic number.

It is not a de Polignac number, because 41015515621 - 2³³ = 32425581029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41015515627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20507757810 + 20507757811.

It is an arithmetic number, because the mean of its divisors is an integer number (20507757811).

Almost surely, 2^41015515621 is an apocalyptic number.

It is an amenable number.

41015515621 is a deficient number, since it is larger than the sum of its proper divisors (1).

41015515621 is an equidigital number, since it uses as much as digits as its factorization.

41015515621 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6000, while the sum is 31.

The spelling of 41015515621 in words is "forty-one billion, fifteen million, five hundred fifteen thousand, six hundred twenty-one".