40040256623 has 2 divisors, whose sum is σ = 40040256624. Its totient is φ = 40040256622.

The previous prime is 40040256601. The next prime is 40040256661. The reversal of 40040256623 is 32665204004.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40040256623 - 2⁶ = 40040256559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40040256623.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40040258623) 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, 20020128311 + 20020128312.

It is an arithmetic number, because the mean of its divisors is an integer number (20020128312).

Almost surely, 2^40040256623 is an apocalyptic number.

40040256623 is a deficient number, since it is larger than the sum of its proper divisors (1).

40040256623 is an equidigital number, since it uses as much as digits as its factorization.

40040256623 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 32.

The spelling of 40040256623 in words is "forty billion, forty million, two hundred fifty-six thousand, six hundred twenty-three".