43541063136561 has 16 divisors (see below), whose sum is σ = 61561073145024. Its totient is φ = 27279288551424.

The previous prime is 43541063136553. The next prime is 43541063136587. The reversal of 43541063136561 is 16563136014534.

It is not a de Polignac number, because 43541063136561 - 2³ = 43541063136553 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 43541063136561.

It is not an unprimeable number, because it can be changed into a prime (43541063136761) 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, 634249731 + ... + 634318376.

It is an arithmetic number, because the mean of its divisors is an integer number (3847567071564).

Almost surely, 2^{43541063136561} is an apocalyptic number.

It is an amenable number.

43541063136561 is a deficient number, since it is larger than the sum of its proper divisors (18020010008463).

43541063136561 is a wasteful number, since it uses less digits than its factorization.

43541063136561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1268568800.

The product of its (nonzero) digits is 2332800, while the sum is 48.

The spelling of 43541063136561 in words is "forty-three trillion, five hundred forty-one billion, sixty-three million, one hundred thirty-six thousand, five hundred sixty-one".