10521534439993 has 2 divisors, whose sum is σ = 10521534439994. Its totient is φ = 10521534439992.

The previous prime is 10521534439957. The next prime is 10521534440071. The reversal of 10521534439993 is 39993443512501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10176304161024 + 345230278969 = 3190032^2 + 587563^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-10521534439993 is a prime.

It is a super-2 number, since 2×10521534439993² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10521534430993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5260767219996 + 5260767219997.

It is an arithmetic number, because the mean of its divisors is an integer number (5260767219997).

Almost surely, 2^{10521534439993} is an apocalyptic number.

It is an amenable number.

10521534439993 is a deficient number, since it is larger than the sum of its proper divisors (1).

10521534439993 is an equidigital number, since it uses as much as digits as its factorization.

10521534439993 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15746400, while the sum is 58.

The spelling of 10521534439993 in words is "ten trillion, five hundred twenty-one billion, five hundred thirty-four million, four hundred thirty-nine thousand, nine hundred ninety-three".