1516253618791 has 2 divisors, whose sum is σ = 1516253618792. Its totient is φ = 1516253618790.

The previous prime is 1516253618777. The next prime is 1516253618923. The reversal of 1516253618791 is 1978163526151.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1516253618791 - 2³⁹ = 966497804903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1516253618701) 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, 758126809395 + 758126809396.

It is an arithmetic number, because the mean of its divisors is an integer number (758126809396).

Almost surely, 2^{1516253618791} is an apocalyptic number.

1516253618791 is a deficient number, since it is larger than the sum of its proper divisors (1).

1516253618791 is an equidigital number, since it uses as much as digits as its factorization.

1516253618791 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2721600, while the sum is 55.

The spelling of 1516253618791 in words is "one trillion, five hundred sixteen billion, two hundred fifty-three million, six hundred eighteen thousand, seven hundred ninety-one".