1262858806864 has 20 divisors (see below), whose sum is σ = 2447446969440. Its totient is φ = 631259588960.

The previous prime is 1262858806841. The next prime is 1262858806931. The reversal of 1262858806864 is 4686088582621.

It is a junction number, because it is equal to n+sod(n) for n = 1262858806796 and 1262858806805.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10552042 + ... + 10671049.

It is an arithmetic number, because the mean of its divisors is an integer number (122372348472).

Almost surely, 2^{1262858806864} is an apocalyptic number.

It is an amenable number.

1262858806864 is a deficient number, since it is larger than the sum of its proper divisors (1184588162576).

1262858806864 is a wasteful number, since it uses less digits than its factorization.

1262858806864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21226818 (or 21226812 counting only the distinct ones).

The product of its (nonzero) digits is 70778880, while the sum is 64.

The spelling of 1262858806864 in words is "one trillion, two hundred sixty-two billion, eight hundred fifty-eight million, eight hundred six thousand, eight hundred sixty-four".