40158398016389 has 2 divisors, whose sum is σ = 40158398016390. Its totient is φ = 40158398016388.

The previous prime is 40158398016329. The next prime is 40158398016413. The reversal of 40158398016389 is 98361089385104.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33078716988100 + 7079681028289 = 5751410^2 + 2660767^2 .

It is a cyclic number.

It is not a de Polignac number, because 40158398016389 - 2⁴⁴ = 22566211971973 is a prime.

It is a super-2 number, since 2×40158398016389² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40158398016329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20079199008194 + 20079199008195.

It is an arithmetic number, because the mean of its divisors is an integer number (20079199008195).

Almost surely, 2^{40158398016389} is an apocalyptic number.

It is an amenable number.

40158398016389 is a deficient number, since it is larger than the sum of its proper divisors (1).

40158398016389 is an equidigital number, since it uses as much as digits as its factorization.

40158398016389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 44789760, while the sum is 65.

The spelling of 40158398016389 in words is "forty trillion, one hundred fifty-eight billion, three hundred ninety-eight million, sixteen thousand, three hundred eighty-nine".