265645651012478 has 16 divisors (see below), whose sum is σ = 453592574061696. Its totient is φ = 115498109135640.

The previous prime is 265645651012477. The next prime is 265645651012513. The reversal of 265645651012478 is 874210156546562.

It is a happy number.

It is a super-2 number, since 2×265645651012478² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 265645651012478.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (265645651012477) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 262495702076 + ... + 262495703087.

It is an arithmetic number, because the mean of its divisors is an integer number (28349535878856).

Almost surely, 2^{265645651012478} is an apocalyptic number.

265645651012478 is a deficient number, since it is larger than the sum of its proper divisors (187946923049218).

265645651012478 is a wasteful number, since it uses less digits than its factorization.

265645651012478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 524991405199.

The product of its (nonzero) digits is 96768000, while the sum is 62.

The spelling of 265645651012478 in words is "two hundred sixty-five trillion, six hundred forty-five billion, six hundred fifty-one million, twelve thousand, four hundred seventy-eight".