40145041397 has 2 divisors, whose sum is σ = 40145041398. Its totient is φ = 40145041396.

The previous prime is 40145041369. The next prime is 40145041427. The reversal of 40145041397 is 79314054104.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 38272661956 + 1872379441 = 195634^2 + 43271^2 .

It is a cyclic number.

It is not a de Polignac number, because 40145041397 - 2⁸ = 40145041141 is a prime.

It is a super-3 number, since 3×40145041397³ (a number of 33 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 40145041397.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40145041337) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20072520698 + 20072520699.

It is an arithmetic number, because the mean of its divisors is an integer number (20072520699).

Almost surely, 2^40145041397 is an apocalyptic number.

It is an amenable number.

40145041397 is a deficient number, since it is larger than the sum of its proper divisors (1).

40145041397 is an equidigital number, since it uses as much as digits as its factorization.

40145041397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 60480, while the sum is 38.

The spelling of 40145041397 in words is "forty billion, one hundred forty-five million, forty-one thousand, three hundred ninety-seven".