1265653310028 has 24 divisors (see below), whose sum is σ = 2954762791680. Its totient is φ = 421659903120.

The previous prime is 1265653310011. The next prime is 1265653310041. The reversal of 1265653310028 is 8200133565621.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28043208 + ... + 28088303.

It is an arithmetic number, because the mean of its divisors is an integer number (123115116320).

Almost surely, 2^{1265653310028} is an apocalyptic number.

It is an amenable number.

1265653310028 is an abundant number, since it is smaller than the sum of its proper divisors (1689109481652).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1265653310028 is a wasteful number, since it uses less digits than its factorization.

1265653310028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56133397 (or 56133395 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 42.

Adding to 1265653310028 its reverse (8200133565621), we get a palindrome (9465786875649).

The spelling of 1265653310028 in words is "one trillion, two hundred sixty-five billion, six hundred fifty-three million, three hundred ten thousand, twenty-eight".