40444400399947 has 2 divisors, whose sum is σ = 40444400399948. Its totient is φ = 40444400399946.

The previous prime is 40444400399869. The next prime is 40444400399983. The reversal of 40444400399947 is 74999300444404.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40444400399947 - 2³⁹ = 39894644586059 is a prime.

It is a super-2 number, since 2×40444400399947² (a number of 28 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40444400399987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20222200199973 + 20222200199974.

It is an arithmetic number, because the mean of its divisors is an integer number (20222200199974).

Almost surely, 2^{40444400399947} is an apocalyptic number.

40444400399947 is a deficient number, since it is larger than the sum of its proper divisors (1).

40444400399947 is an equidigital number, since it uses as much as digits as its factorization.

40444400399947 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 62705664, while the sum is 61.

The spelling of 40444400399947 in words is "forty trillion, four hundred forty-four billion, four hundred million, three hundred ninety-nine thousand, nine hundred forty-seven".