25770238866 has 48 divisors (see below), whose sum is σ = 56992327704. Its totient is φ = 8412698112.

The previous prime is 25770238861. The next prime is 25770238867. The reversal of 25770238866 is 66883207752.

25770238866 is a `hidden beast` number, since 2 + 577 + 0 + 2 + 3 + 8 + 8 + 66 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 14830124841 + 10940114025 = 121779^2 + 104595^2 .

It is a super-2 number, since 2×25770238866² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (25770238861) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 507130 + ... + 555626.

Almost surely, 2^25770238866 is an apocalyptic number.

25770238866 is an abundant number, since it is smaller than the sum of its proper divisors (31222088838).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

25770238866 is a wasteful number, since it uses less digits than its factorization.

25770238866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49115 (or 49112 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 54.

The spelling of 25770238866 in words is "twenty-five billion, seven hundred seventy million, two hundred thirty-eight thousand, eight hundred sixty-six".