1625697768266 has 48 divisors (see below), whose sum is σ = 2926111989192. Its totient is φ = 672766871040.

The previous prime is 1625697768161. The next prime is 1625697768301. The reversal of 1625697768266 is 6628677965261.

It can be written as a sum of positive squares in 4 ways, for example, as 1307201202241 + 318496566025 = 1143329^2 + 564355^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1625697768266.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 3309731 + ... + 3769046.

Almost surely, 2^{1625697768266} is an apocalyptic number.

1625697768266 is a deficient number, since it is larger than the sum of its proper divisors (1300414220926).

1625697768266 is a wasteful number, since it uses less digits than its factorization.

1625697768266 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7078887 (or 7078876 counting only the distinct ones).

The product of its digits is 548674560, while the sum is 71.

The spelling of 1625697768266 in words is "one trillion, six hundred twenty-five billion, six hundred ninety-seven million, seven hundred sixty-eight thousand, two hundred sixty-six".