40146906689 has 2 divisors, whose sum is σ = 40146906690. Its totient is φ = 40146906688.

The previous prime is 40146906673. The next prime is 40146906703. The reversal of 40146906689 is 98660964104.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20994561025 + 19152345664 = 144895^2 + 138392^2 .

It is a cyclic number.

It is not a de Polignac number, because 40146906689 - 2⁴ = 40146906673 is a prime.

It is a super-2 number, since 2×40146906689² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40146906689.

It is not a weakly prime, because it can be changed into another prime (40146906659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20073453344 + 20073453345.

It is an arithmetic number, because the mean of its divisors is an integer number (20073453345).

Almost surely, 2^40146906689 is an apocalyptic number.

It is an amenable number.

40146906689 is a deficient number, since it is larger than the sum of its proper divisors (1).

40146906689 is an equidigital number, since it uses as much as digits as its factorization.

40146906689 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2239488, while the sum is 53.

The spelling of 40146906689 in words is "forty billion, one hundred forty-six million, nine hundred six thousand, six hundred eighty-nine".