265645651012505 has 8 divisors (see below), whose sum is σ = 319199248305024. Its totient is φ = 212233542750000.

The previous prime is 265645651012477. The next prime is 265645651012513. The reversal of 265645651012505 is 505210156546562.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 265645651012505 - 2¹⁶ = 265645650946969 is a prime.

It is a super-2 number, since 2×265645651012505² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35372253371 + ... + 35372260880.

It is an arithmetic number, because the mean of its divisors is an integer number (39899906038128).

Almost surely, 2^{265645651012505} is an apocalyptic number.

It is an amenable number.

265645651012505 is a deficient number, since it is larger than the sum of its proper divisors (53553597292519).

265645651012505 is an equidigital number, since it uses as much as digits as its factorization.

265645651012505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70744515007.

The product of its (nonzero) digits is 10800000, while the sum is 53.

The spelling of 265645651012505 in words is "two hundred sixty-five trillion, six hundred forty-five billion, six hundred fifty-one million, twelve thousand, five hundred five".