265351663621061 has 16 divisors (see below), whose sum is σ = 272745820537344. Its totient is φ = 257969275533504.

The previous prime is 265351663621043. The next prime is 265351663621063. The reversal of 265351663621061 is 160126366153562.

It is a cyclic number.

It is not a de Polignac number, because 265351663621061 - 2¹⁸ = 265351663358917 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 265351663620994 and 265351663621012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265351663621063) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 327350486 + ... + 328160088.

It is an arithmetic number, because the mean of its divisors is an integer number (17046613783584).

Almost surely, 2^{265351663621061} is an apocalyptic number.

It is an amenable number.

265351663621061 is a deficient number, since it is larger than the sum of its proper divisors (7394156916283).

265351663621061 is a wasteful number, since it uses less digits than its factorization.

265351663621061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 816860.

The product of its (nonzero) digits is 6998400, while the sum is 53.

The spelling of 265351663621061 in words is "two hundred sixty-five trillion, three hundred fifty-one billion, six hundred sixty-three million, six hundred twenty-one thousand, sixty-one".