40505551201 has 2 divisors, whose sum is σ = 40505551202. Its totient is φ = 40505551200.

The previous prime is 40505551181. The next prime is 40505551249. The reversal of 40505551201 is 10215550504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39888078400 + 617472801 = 199720^2 + 24849^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40505551201 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40505551201.

It is not a weakly prime, because it can be changed into another prime (40505551301) 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, 20252775600 + 20252775601.

It is an arithmetic number, because the mean of its divisors is an integer number (20252775601).

Almost surely, 2^40505551201 is an apocalyptic number.

It is an amenable number.

40505551201 is a deficient number, since it is larger than the sum of its proper divisors (1).

40505551201 is an equidigital number, since it uses as much as digits as its factorization.

40505551201 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5000, while the sum is 28.

The spelling of 40505551201 in words is "forty billion, five hundred five million, five hundred fifty-one thousand, two hundred one".