40444400137849 has 2 divisors, whose sum is σ = 40444400137850. Its totient is φ = 40444400137848.

The previous prime is 40444400137777. The next prime is 40444400138011. The reversal of 40444400137849 is 94873100444404.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26283719365225 + 14160680772624 = 5126765^2 + 3763068^2 .

It is a cyclic number.

It is not a de Polignac number, because 40444400137849 - 2¹⁹ = 40444399613561 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40444400137796 and 40444400137805.

It is not a weakly prime, because it can be changed into another prime (40444400137649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20222200068924 + 20222200068925.

It is an arithmetic number, because the mean of its divisors is an integer number (20222200068925).

Almost surely, 2^{40444400137849} is an apocalyptic number.

It is an amenable number.

40444400137849 is a deficient number, since it is larger than the sum of its proper divisors (1).

40444400137849 is an equidigital number, since it uses as much as digits as its factorization.

40444400137849 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6193152, while the sum is 52.

The spelling of 40444400137849 in words is "forty trillion, four hundred forty-four billion, four hundred million, one hundred thirty-seven thousand, eight hundred forty-nine".