1264803210265 has 16 divisors (see below), whose sum is σ = 1736684744832. Its totient is φ = 866244887424.

The previous prime is 1264803210259. The next prime is 1264803210311. The reversal of 1264803210265 is 5620123084621.

It is not a de Polignac number, because 1264803210265 - 2⁵ = 1264803210233 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21819444 + ... + 21877333.

It is an arithmetic number, because the mean of its divisors is an integer number (108542796552).

Almost surely, 2^{1264803210265} is an apocalyptic number.

It is an amenable number.

1264803210265 is a deficient number, since it is larger than the sum of its proper divisors (471881534567).

1264803210265 is an equidigital number, since it uses as much as digits as its factorization.

1264803210265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43697616.

The product of its (nonzero) digits is 138240, while the sum is 40.

Adding to 1264803210265 its reverse (5620123084621), we get a palindrome (6884926294886).

The spelling of 1264803210265 in words is "one trillion, two hundred sixty-four billion, eight hundred three million, two hundred ten thousand, two hundred sixty-five".