1651516668013 has 2 divisors, whose sum is σ = 1651516668014. Its totient is φ = 1651516668012.

The previous prime is 1651516668001. The next prime is 1651516668059. The reversal of 1651516668013 is 3108666151561.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1393953312964 + 257563355049 = 1180658^2 + 507507^2 .

It is a cyclic number.

It is not a de Polignac number, because 1651516668013 - 2¹⁷ = 1651516536941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1651516668313) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 825758334006 + 825758334007.

It is an arithmetic number, because the mean of its divisors is an integer number (825758334007).

Almost surely, 2^{1651516668013} is an apocalyptic number.

It is an amenable number.

1651516668013 is a deficient number, since it is larger than the sum of its proper divisors (1).

1651516668013 is an equidigital number, since it uses as much as digits as its factorization.

1651516668013 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 777600, while the sum is 49.

It can be divided in two parts, 1651516 and 668013, that added together give a square (2319529 = 1523²).

The spelling of 1651516668013 in words is "one trillion, six hundred fifty-one billion, five hundred sixteen million, six hundred sixty-eight thousand, thirteen".