40687388389 has 2 divisors, whose sum is σ = 40687388390. Its totient is φ = 40687388388.

The previous prime is 40687388383. The next prime is 40687388419. The reversal of 40687388389 is 98388378604.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32302872900 + 8384515489 = 179730^2 + 91567^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40687388389 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40687388389.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40687388383) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20343694194 + 20343694195.

It is an arithmetic number, because the mean of its divisors is an integer number (20343694195).

Almost surely, 2^40687388389 is an apocalyptic number.

It is an amenable number.

40687388389 is a deficient number, since it is larger than the sum of its proper divisors (1).

40687388389 is an equidigital number, since it uses as much as digits as its factorization.

40687388389 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 55738368, while the sum is 64.

The spelling of 40687388389 in words is "forty billion, six hundred eighty-seven million, three hundred eighty-eight thousand, three hundred eighty-nine".