43422620534561 has 4 divisors (see below), whose sum is σ = 44481708840324. Its totient is φ = 42363532228800.

The previous prime is 43422620534477. The next prime is 43422620534597. The reversal of 43422620534561 is 16543502622434.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4026523824400 + 39396096710161 = 2006620^2 + 6276631^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43422620534561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (43422620834561) 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, 529544152820 + ... + 529544152901.

It is an arithmetic number, because the mean of its divisors is an integer number (11120427210081).

Almost surely, 2^{43422620534561} is an apocalyptic number.

43422620534561 is a gapful number since it is divisible by the number (41) formed by its first and last digit.

It is an amenable number.

43422620534561 is a deficient number, since it is larger than the sum of its proper divisors (1059088305763).

43422620534561 is a wasteful number, since it uses less digits than its factorization.

43422620534561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059088305762.

The product of its (nonzero) digits is 4147200, while the sum is 47.

The spelling of 43422620534561 in words is "forty-three trillion, four hundred twenty-two billion, six hundred twenty million, five hundred thirty-four thousand, five hundred sixty-one".