1265000001264 has 30 divisors (see below), whose sum is σ = 3540243059496. Its totient is φ = 421666667040.

The previous prime is 1265000001263. The next prime is 1265000001347. The reversal of 1265000001264 is 4621000005621.

1265000001264 is a `hidden beast` number, since 1 + 2 + 650 + 0 + 0 + 0 + 0 + 1 + 2 + 6 + 4 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1265000001263) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 4392360972 + ... + 4392361259.

Almost surely, 2^{1265000001264} is an apocalyptic number.

It is an amenable number.

1265000001264 is an abundant number, since it is smaller than the sum of its proper divisors (2275243058232).

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

1265000001264 is a wasteful number, since it uses less digits than its factorization.

1265000001264 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8784722245 (or 8784722236 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

Adding to 1265000001264 its reverse (4621000005621), we get a palindrome (5886000006885).

The spelling of 1265000001264 in words is "one trillion, two hundred sixty-five billion, one thousand, two hundred sixty-four".