1199450720651 has 2 divisors, whose sum is σ = 1199450720652. Its totient is φ = 1199450720650.

The previous prime is 1199450720639. The next prime is 1199450720687. The reversal of 1199450720651 is 1560270549911.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1199450720651 - 2¹⁴ = 1199450704267 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1199450720651.

It is not a weakly prime, because it can be changed into another prime (1199450720551) 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, 599725360325 + 599725360326.

It is an arithmetic number, because the mean of its divisors is an integer number (599725360326).

Almost surely, 2^{1199450720651} is an apocalyptic number.

1199450720651 is a deficient number, since it is larger than the sum of its proper divisors (1).

1199450720651 is an equidigital number, since it uses as much as digits as its factorization.

1199450720651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 680400, while the sum is 50.

The spelling of 1199450720651 in words is "one trillion, one hundred ninety-nine billion, four hundred fifty million, seven hundred twenty thousand, six hundred fifty-one".