40398798950399 has 16 divisors (see below), whose sum is σ = 41113975898112. Its totient is φ = 39689859783168.

The previous prime is 40398798950351. The next prime is 40398798950423. The reversal of 40398798950399 is 99305989789304.

It is a cyclic number.

It is not a de Polignac number, because 40398798950399 - 2⁸ = 40398798950143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40398798950329) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 393726047 + ... + 393828639.

It is an arithmetic number, because the mean of its divisors is an integer number (2569623493632).

Almost surely, 2^{40398798950399} is an apocalyptic number.

40398798950399 is a deficient number, since it is larger than the sum of its proper divisors (715176947713).

40398798950399 is a wasteful number, since it uses less digits than its factorization.

40398798950399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132926.

The product of its (nonzero) digits is 4761711360, while the sum is 83.

The spelling of 40398798950399 in words is "forty trillion, three hundred ninety-eight billion, seven hundred ninety-eight million, nine hundred fifty thousand, three hundred ninety-nine".