4020266759681 has 2 divisors, whose sum is σ = 4020266759682. Its totient is φ = 4020266759680.

The previous prime is 4020266759651. The next prime is 4020266759723. The reversal of 4020266759681 is 1869576620204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2154627658225 + 1865639101456 = 1467865^2 + 1365884^2 .

It is a cyclic number.

It is not a de Polignac number, because 4020266759681 - 2⁶ = 4020266759617 is a prime.

It is a super-2 number, since 2×4020266759681² (a number of 26 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (4020266759611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2010133379840 + 2010133379841.

It is an arithmetic number, because the mean of its divisors is an integer number (2010133379841).

Almost surely, 2^{4020266759681} is an apocalyptic number.

It is an amenable number.

4020266759681 is a deficient number, since it is larger than the sum of its proper divisors (1).

4020266759681 is an equidigital number, since it uses as much as digits as its factorization.

4020266759681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8709120, while the sum is 56.

The spelling of 4020266759681 in words is "four trillion, twenty billion, two hundred sixty-six million, seven hundred fifty-nine thousand, six hundred eighty-one".