1235912812668 has 72 divisors (see below), whose sum is σ = 3288695621120. Its totient is φ = 390269780640.

The previous prime is 1235912812661. The next prime is 1235912812699. The reversal of 1235912812668 is 8662182195321.

1235912812668 is a `hidden beast` number, since 1 + 2 + 3 + 591 + 28 + 1 + 26 + 6 + 8 = 666.

It is a super-2 number, since 2×1235912812668² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1235912812661) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26000403 + ... + 26047893.

Almost surely, 2^{1235912812668} is an apocalyptic number.

1235912812668 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1235912812668 is an abundant number, since it is smaller than the sum of its proper divisors (2052782808452).

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

1235912812668 is a wasteful number, since it uses less digits than its factorization.

1235912812668 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85567 (or 85562 counting only the distinct ones).

The product of its digits is 2488320, while the sum is 54.

The spelling of 1235912812668 in words is "one trillion, two hundred thirty-five billion, nine hundred twelve million, eight hundred twelve thousand, six hundred sixty-eight".