41812821861 has 4 divisors (see below), whose sum is σ = 55750429152. Its totient is φ = 27875214572.

The previous prime is 41812821859. The next prime is 41812821863. The reversal of 41812821861 is 16812821814.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (41812821859) and next prime (41812821863).

It is a cyclic number.

It is not a de Polignac number, because 41812821861 - 2¹ = 41812821859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41812821863) 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 in 3 ways as a sum of consecutive naturals, for example, 6968803641 + ... + 6968803646.

It is an arithmetic number, because the mean of its divisors is an integer number (13937607288).

Almost surely, 2^41812821861 is an apocalyptic number.

It is an amenable number.

41812821861 is a deficient number, since it is larger than the sum of its proper divisors (13937607291).

41812821861 is a wasteful number, since it uses less digits than its factorization.

41812821861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13937607290.

The product of its digits is 49152, while the sum is 42.

The spelling of 41812821861 in words is "forty-one billion, eight hundred twelve million, eight hundred twenty-one thousand, eight hundred sixty-one".