43623632641 has 2 divisors, whose sum is σ = 43623632642. Its totient is φ = 43623632640.

The previous prime is 43623632621. The next prime is 43623632651. The reversal of 43623632641 is 14623632634.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36679910400 + 6943722241 = 191520^2 + 83329^2 .

It is a cyclic number.

It is not a de Polignac number, because 43623632641 - 2⁵ = 43623632609 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 43623632594 and 43623632603.

It is not a weakly prime, because it can be changed into another prime (43623632621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21811816320 + 21811816321.

It is an arithmetic number, because the mean of its divisors is an integer number (21811816321).

Almost surely, 2^43623632641 is an apocalyptic number.

It is an amenable number.

43623632641 is a deficient number, since it is larger than the sum of its proper divisors (1).

43623632641 is an equidigital number, since it uses as much as digits as its factorization.

43623632641 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 373248, while the sum is 40.

The spelling of 43623632641 in words is "forty-three billion, six hundred twenty-three million, six hundred thirty-two thousand, six hundred forty-one".