40456442473 has 2 divisors, whose sum is σ = 40456442474. Its totient is φ = 40456442472.

The previous prime is 40456442471. The next prime is 40456442581. The reversal of 40456442473 is 37424465404.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40289722729 + 166719744 = 200723^2 + 12912^2 .

It is a cyclic number.

It is not a de Polignac number, because 40456442473 - 2¹ = 40456442471 is a prime.

Together with 40456442471, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (40456442471) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20228221236 + 20228221237.

It is an arithmetic number, because the mean of its divisors is an integer number (20228221237).

Almost surely, 2^40456442473 is an apocalyptic number.

It is an amenable number.

40456442473 is a deficient number, since it is larger than the sum of its proper divisors (1).

40456442473 is an equidigital number, since it uses as much as digits as its factorization.

40456442473 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 43.

The spelling of 40456442473 in words is "forty billion, four hundred fifty-six million, four hundred forty-two thousand, four hundred seventy-three".