26862226621 has 2 divisors, whose sum is σ = 26862226622. Its totient is φ = 26862226620.

The previous prime is 26862226577. The next prime is 26862226627. The reversal of 26862226621 is 12662226862.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25957720996 + 904505625 = 161114^2 + 30075^2 .

It is a cyclic number.

It is not a de Polignac number, because 26862226621 - 2¹⁷ = 26862095549 is a prime.

It is a super-2 number, since 2×26862226621² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (26862226627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13431113310 + 13431113311.

It is an arithmetic number, because the mean of its divisors is an integer number (13431113311).

Almost surely, 2^26862226621 is an apocalyptic number.

It is an amenable number.

26862226621 is a deficient number, since it is larger than the sum of its proper divisors (1).

26862226621 is an equidigital number, since it uses as much as digits as its factorization.

26862226621 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 43.

The spelling of 26862226621 in words is "twenty-six billion, eight hundred sixty-two million, two hundred twenty-six thousand, six hundred twenty-one".