40040256601 has 2 divisors, whose sum is σ = 40040256602. Its totient is φ = 40040256600.

The previous prime is 40040256593. The next prime is 40040256623. The reversal of 40040256601 is 10665204004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 40014001225 + 26255376 = 200035^2 + 5124^2 .

It is a cyclic number.

It is not a de Polignac number, because 40040256601 - 2³ = 40040256593 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40040256601.

It is not a weakly prime, because it can be changed into another prime (40040256661) 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, 20020128300 + 20020128301.

It is an arithmetic number, because the mean of its divisors is an integer number (20020128301).

Almost surely, 2^40040256601 is an apocalyptic number.

It is an amenable number.

40040256601 is a deficient number, since it is larger than the sum of its proper divisors (1).

40040256601 is an equidigital number, since it uses as much as digits as its factorization.

40040256601 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5760, while the sum is 28.

The spelling of 40040256601 in words is "forty billion, forty million, two hundred fifty-six thousand, six hundred one".