1236812581468 has 12 divisors (see below), whose sum is σ = 2164439856600. Its totient is φ = 618401193872.

The previous prime is 1236812581463. The next prime is 1236812581481. The reversal of 1236812581468 is 8641852186321.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1236812581463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699418 + ... + 1721281.

It is an arithmetic number, because the mean of its divisors is an integer number (180369988050).

Almost surely, 2^{1236812581468} is an apocalyptic number.

It is an amenable number.

1236812581468 is a deficient number, since it is larger than the sum of its proper divisors (927627275132).

1236812581468 is a wasteful number, since it uses less digits than its factorization.

1236812581468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2548436 (or 2548434 counting only the distinct ones).

The product of its digits is 4423680, while the sum is 55.

The spelling of 1236812581468 in words is "one trillion, two hundred thirty-six billion, eight hundred twelve million, five hundred eighty-one thousand, four hundred sixty-eight".