1265252504164 has 48 divisors (see below), whose sum is σ = 2560204656576. Its totient is φ = 540726732800.

The previous prime is 1265252504141. The next prime is 1265252504171. The reversal of 1265252504164 is 4614052525621.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 1265252504164.

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 15 ways as a sum of consecutive naturals, for example, 144709 + ... + 1597324.

It is an arithmetic number, because the mean of its divisors is an integer number (53337597012).

Almost surely, 2^{1265252504164} is an apocalyptic number.

It is an amenable number.

1265252504164 is an abundant number, since it is smaller than the sum of its proper divisors (1294952152412).

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

1265252504164 is a wasteful number, since it uses less digits than its factorization.

1265252504164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1743036 (or 1743034 counting only the distinct ones).

The product of its (nonzero) digits is 576000, while the sum is 43.

The spelling of 1265252504164 in words is "one trillion, two hundred sixty-five billion, two hundred fifty-two million, five hundred four thousand, one hundred sixty-four".