265605226601651 has 2 divisors, whose sum is σ = 265605226601652. Its totient is φ = 265605226601650.

The previous prime is 265605226601633. The next prime is 265605226601677. The reversal of 265605226601651 is 156106622506562.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 265605226601651 - 2¹⁴ = 265605226585267 is a prime.

It is a super-3 number, since 3×265605226601651³ (a number of 44 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a junction number, because it is equal to n+sod(n) for n = 265605226601593 and 265605226601602.

It is not a weakly prime, because it can be changed into another prime (265605226606651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132802613300825 + 132802613300826.

It is an arithmetic number, because the mean of its divisors is an integer number (132802613300826).

Almost surely, 2^{265605226601651} is an apocalyptic number.

265605226601651 is a deficient number, since it is larger than the sum of its proper divisors (1).

265605226601651 is an equidigital number, since it uses as much as digits as its factorization.

265605226601651 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776000, while the sum is 53.

The spelling of 265605226601651 in words is "two hundred sixty-five trillion, six hundred five billion, two hundred twenty-six million, six hundred one thousand, six hundred fifty-one".