40245406687 has 2 divisors, whose sum is σ = 40245406688. Its totient is φ = 40245406686.

The previous prime is 40245406631. The next prime is 40245406711. The reversal of 40245406687 is 78660454204.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40245406687 - 2⁷ = 40245406559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40245406087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20122703343 + 20122703344.

It is an arithmetic number, because the mean of its divisors is an integer number (20122703344).

Almost surely, 2^40245406687 is an apocalyptic number.

40245406687 is a deficient number, since it is larger than the sum of its proper divisors (1).

40245406687 is an equidigital number, since it uses as much as digits as its factorization.

40245406687 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1290240, while the sum is 46.

The spelling of 40245406687 in words is "forty billion, two hundred forty-five million, four hundred six thousand, six hundred eighty-seven".