2026217524781 has 2 divisors, whose sum is σ = 2026217524782. Its totient is φ = 2026217524780.

The previous prime is 2026217524769. The next prime is 2026217524817. The reversal of 2026217524781 is 1874257126202.

Together with next prime (2026217524817) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1884879122281 + 141338402500 = 1372909^2 + 375950^2 .

It is a cyclic number.

It is not a de Polignac number, because 2026217524781 - 2¹⁴ = 2026217508397 is a prime.

It is a super-2 number, since 2×2026217524781² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2026217524741) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1013108762390 + 1013108762391.

It is an arithmetic number, because the mean of its divisors is an integer number (1013108762391).

Almost surely, 2^{2026217524781} is an apocalyptic number.

It is an amenable number.

2026217524781 is a deficient number, since it is larger than the sum of its proper divisors (1).

2026217524781 is an equidigital number, since it uses as much as digits as its factorization.

2026217524781 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 752640, while the sum is 47.

The spelling of 2026217524781 in words is "two trillion, twenty-six billion, two hundred seventeen million, five hundred twenty-four thousand, seven hundred eighty-one".