43641261056641 has 16 divisors (see below), whose sum is σ = 44527263192000. Its totient is φ = 42762694157568.

The previous prime is 43641261056611. The next prime is 43641261056663. The reversal of 43641261056641 is 14665016214634.

It is a cyclic number.

It is not a de Polignac number, because 43641261056641 - 2³¹ = 43639113572993 is a prime.

It is a super-2 number, since 2×43641261056641² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43641261056611) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8766285 + ... + 12811333.

It is an arithmetic number, because the mean of its divisors is an integer number (2782953949500).

Almost surely, 2^{43641261056641} is an apocalyptic number.

It is an amenable number.

43641261056641 is a deficient number, since it is larger than the sum of its proper divisors (886002135359).

43641261056641 is a wasteful number, since it uses less digits than its factorization.

43641261056641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4045968.

The product of its (nonzero) digits is 2488320, while the sum is 49.

The spelling of 43641261056641 in words is "forty-three trillion, six hundred forty-one billion, two hundred sixty-one million, fifty-six thousand, six hundred forty-one".