1205052866951 has 2 divisors, whose sum is σ = 1205052866952. Its totient is φ = 1205052866950.

The previous prime is 1205052866923. The next prime is 1205052867077. The reversal of 1205052866951 is 1596682505021.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1205052866951 - 2³⁴ = 1187872997767 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1205052866951.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1205052866551) 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, 602526433475 + 602526433476.

It is an arithmetic number, because the mean of its divisors is an integer number (602526433476).

Almost surely, 2^{1205052866951} is an apocalyptic number.

1205052866951 is a deficient number, since it is larger than the sum of its proper divisors (1).

1205052866951 is an equidigital number, since it uses as much as digits as its factorization.

1205052866951 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296000, while the sum is 50.

Adding to 1205052866951 its sum of digits (50), we get a square (1205052867001 = 1097749²).

The spelling of 1205052866951 in words is "one trillion, two hundred five billion, fifty-two million, eight hundred sixty-six thousand, nine hundred fifty-one".