1265000651255 has 64 divisors (see below), whose sum is σ = 1846135411200. Its totient is φ = 820115435520.

The previous prime is 1265000651203. The next prime is 1265000651279. The reversal of 1265000651255 is 5521560005621.

It is not a de Polignac number, because 1265000651255 - 2²⁴ = 1264983874039 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 143696684 + ... + 143705486.

It is an arithmetic number, because the mean of its divisors is an integer number (28845865800).

Almost surely, 2^{1265000651255} is an apocalyptic number.

1265000651255 is a deficient number, since it is larger than the sum of its proper divisors (581134759945).

1265000651255 is a wasteful number, since it uses less digits than its factorization.

1265000651255 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16944.

The product of its (nonzero) digits is 90000, while the sum is 38.

Adding to 1265000651255 its reverse (5521560005621), we get a palindrome (6786560656876).

The spelling of 1265000651255 in words is "one trillion, two hundred sixty-five billion, six hundred fifty-one thousand, two hundred fifty-five".