1521034411993 has 2 divisors, whose sum is σ = 1521034411994. Its totient is φ = 1521034411992.

The previous prime is 1521034411991. The next prime is 1521034412017. The reversal of 1521034411993 is 3991144301251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 788140899529 + 732893512464 = 887773^2 + 856092^2 .

It is a cyclic number.

It is not a de Polignac number, because 1521034411993 - 2¹ = 1521034411991 is a prime.

Together with 1521034411991, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1521034411991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 760517205996 + 760517205997.

It is an arithmetic number, because the mean of its divisors is an integer number (760517205997).

Almost surely, 2^{1521034411993} is an apocalyptic number.

It is an amenable number.

1521034411993 is a deficient number, since it is larger than the sum of its proper divisors (1).

1521034411993 is an equidigital number, since it uses as much as digits as its factorization.

1521034411993 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 116640, while the sum is 43.

The spelling of 1521034411993 in words is "one trillion, five hundred twenty-one billion, thirty-four million, four hundred eleven thousand, nine hundred ninety-three".