43200736661 has 2 divisors, whose sum is σ = 43200736662. Its totient is φ = 43200736660.

The previous prime is 43200736627. The next prime is 43200736673. The reversal of 43200736661 is 16663700234.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39988000900 + 3212735761 = 199970^2 + 56681^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-43200736661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (43200736261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21600368330 + 21600368331.

It is an arithmetic number, because the mean of its divisors is an integer number (21600368331).

Almost surely, 2^43200736661 is an apocalyptic number.

It is an amenable number.

43200736661 is a deficient number, since it is larger than the sum of its proper divisors (1).

43200736661 is an equidigital number, since it uses as much as digits as its factorization.

43200736661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 38.

The spelling of 43200736661 in words is "forty-three billion, two hundred million, seven hundred thirty-six thousand, six hundred sixty-one".