1264000025265 has 16 divisors (see below), whose sum is σ = 2077059501888. Its totient is φ = 655913526336.

The previous prime is 1264000025207. The next prime is 1264000025287. The reversal of 1264000025265 is 5625200004621.

It is not a de Polignac number, because 1264000025265 - 2¹¹ = 1264000023217 is a prime.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1138738207 + ... + 1138739316.

It is an arithmetic number, because the mean of its divisors is an integer number (129816218868).

Almost surely, 2^{1264000025265} is an apocalyptic number.

1264000025265 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1264000025265 is a deficient number, since it is larger than the sum of its proper divisors (813059476623).

1264000025265 is a wasteful number, since it uses less digits than its factorization.

1264000025265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2277477568.

The product of its (nonzero) digits is 28800, while the sum is 33.

Adding to 1264000025265 its reverse (5625200004621), we get a palindrome (6889200029886).

The spelling of 1264000025265 in words is "one trillion, two hundred sixty-four billion, twenty-five thousand, two hundred sixty-five".