41821609877 has 2 divisors, whose sum is σ = 41821609878. Its totient is φ = 41821609876.

The previous prime is 41821609861. The next prime is 41821609913. The reversal of 41821609877 is 77890612814.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23198640721 + 18622969156 = 152311^2 + 136466^2 .

It is a cyclic number.

It is not a de Polignac number, because 41821609877 - 2⁴ = 41821609861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (41821605877) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20910804938 + 20910804939.

It is an arithmetic number, because the mean of its divisors is an integer number (20910804939).

Almost surely, 2^41821609877 is an apocalyptic number.

It is an amenable number.

41821609877 is a deficient number, since it is larger than the sum of its proper divisors (1).

41821609877 is an equidigital number, since it uses as much as digits as its factorization.

41821609877 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1354752, while the sum is 53.

The spelling of 41821609877 in words is "forty-one billion, eight hundred twenty-one million, six hundred nine thousand, eight hundred seventy-seven".