10020040775681 has 2 divisors, whose sum is σ = 10020040775682. Its totient is φ = 10020040775680.

The previous prime is 10020040775653. The next prime is 10020040775807. The reversal of 10020040775681 is 18657704002001.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 8303964355600 + 1716076420081 = 2881660^2 + 1309991^2 .

It is a cyclic number.

It is not a de Polignac number, because 10020040775681 - 2¹⁰ = 10020040774657 is a prime.

It is a super-2 number, since 2×10020040775681² (a number of 27 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (10020040775651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5010020387840 + 5010020387841.

It is an arithmetic number, because the mean of its divisors is an integer number (5010020387841).

Almost surely, 2^{10020040775681} is an apocalyptic number.

It is an amenable number.

10020040775681 is a deficient number, since it is larger than the sum of its proper divisors (1).

10020040775681 is an equidigital number, since it uses as much as digits as its factorization.

10020040775681 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 41.

Adding to 10020040775681 its reverse (18657704002001), we get a palindrome (28677744777682).

The spelling of 10020040775681 in words is "ten trillion, twenty billion, forty million, seven hundred seventy-five thousand, six hundred eighty-one".