41156644021 has 4 divisors (see below), whose sum is σ = 43322783200. Its totient is φ = 38990504844.

The previous prime is 41156643977. The next prime is 41156644091. The reversal of 41156644021 is 12044665114.

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, and also an emirpimes, since its reverse is a distinct semiprime: 12044665114 = 2 ⋅6022332557.

It is a cyclic number.

It is not a de Polignac number, because 41156644021 - 2¹³ = 41156635829 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (41156644091) 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, 1083069561 + ... + 1083069598.

It is an arithmetic number, because the mean of its divisors is an integer number (10830695800).

Almost surely, 2^41156644021 is an apocalyptic number.

It is an amenable number.

41156644021 is a deficient number, since it is larger than the sum of its proper divisors (2166139179).

41156644021 is a wasteful number, since it uses less digits than its factorization.

41156644021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2166139178.

The product of its (nonzero) digits is 23040, while the sum is 34.

The spelling of 41156644021 in words is "forty-one billion, one hundred fifty-six million, six hundred forty-four thousand, twenty-one".