43450409537 has 2 divisors, whose sum is σ = 43450409538. Its totient is φ = 43450409536.

The previous prime is 43450409479. The next prime is 43450409539. The reversal of 43450409537 is 73590405434.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24335688001 + 19114721536 = 155999^2 + 138256^2 .

It is a cyclic number.

It is not a de Polignac number, because 43450409537 - 2¹² = 43450405441 is a prime.

Together with 43450409539, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (43450409539) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21725204768 + 21725204769.

It is an arithmetic number, because the mean of its divisors is an integer number (21725204769).

Almost surely, 2^43450409537 is an apocalyptic number.

It is an amenable number.

43450409537 is a deficient number, since it is larger than the sum of its proper divisors (1).

43450409537 is an equidigital number, since it uses as much as digits as its factorization.

43450409537 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 907200, while the sum is 44.

The spelling of 43450409537 in words is "forty-three billion, four hundred fifty million, four hundred nine thousand, five hundred thirty-seven".