10521517662797 has 2 divisors, whose sum is σ = 10521517662798. Its totient is φ = 10521517662796.

The previous prime is 10521517662793. The next prime is 10521517662809. The reversal of 10521517662797 is 79726671512501.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 5961537523876 + 4559980138921 = 2441626^2 + 2135411^2 .

It is a cyclic number.

It is not a de Polignac number, because 10521517662797 - 2² = 10521517662793 is a prime.

It is a super-2 number, since 2×10521517662797² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (10521517662793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5260758831398 + 5260758831399.

It is an arithmetic number, because the mean of its divisors is an integer number (5260758831399).

Almost surely, 2^{10521517662797} is an apocalyptic number.

It is an amenable number.

10521517662797 is a deficient number, since it is larger than the sum of its proper divisors (1).

10521517662797 is an equidigital number, since it uses as much as digits as its factorization.

10521517662797 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 11113200, while the sum is 59.

The spelling of 10521517662797 in words is "ten trillion, five hundred twenty-one billion, five hundred seventeen million, six hundred sixty-two thousand, seven hundred ninety-seven".