1288406265851 has 2 divisors, whose sum is σ = 1288406265852. Its totient is φ = 1288406265850.

The previous prime is 1288406265803. The next prime is 1288406265907. The reversal of 1288406265851 is 1585626048821.

It is an a-pointer prime, because the next prime (1288406265907) can be obtained adding 1288406265851 to its sum of digits (56).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1288406265851 - 2⁶ = 1288406265787 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (1288406265151) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 644203132925 + 644203132926.

It is an arithmetic number, because the mean of its divisors is an integer number (644203132926).

Almost surely, 2^{1288406265851} is an apocalyptic number.

1288406265851 is a deficient number, since it is larger than the sum of its proper divisors (1).

1288406265851 is an equidigital number, since it uses as much as digits as its factorization.

1288406265851 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7372800, while the sum is 56.

The spelling of 1288406265851 in words is "one trillion, two hundred eighty-eight billion, four hundred six million, two hundred sixty-five thousand, eight hundred fifty-one".