40447072447 has 2 divisors, whose sum is σ = 40447072448. Its totient is φ = 40447072446.

The previous prime is 40447072397. The next prime is 40447072481. The reversal of 40447072447 is 74427074404.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40447072447 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40447052447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20223536223 + 20223536224.

It is an arithmetic number, because the mean of its divisors is an integer number (20223536224).

Almost surely, 2^40447072447 is an apocalyptic number.

40447072447 is a deficient number, since it is larger than the sum of its proper divisors (1).

40447072447 is an equidigital number, since it uses as much as digits as its factorization.

40447072447 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 702464, while the sum is 43.

The spelling of 40447072447 in words is "forty billion, four hundred forty-seven million, seventy-two thousand, four hundred forty-seven".