1231797427488 has 576 divisors, whose sum is σ = 3980085258240. Its totient is φ = 373417454592.

The previous prime is 1231797427453. The next prime is 1231797427489. The reversal of 1231797427488 is 8847247971321.

1231797427488 is a `hidden beast` number, since 1 + 23 + 1 + 7 + 97 + 42 + 7 + 488 = 666.

It is not an unprimeable number, because it can be changed into a prime (1231797427489) by changing a digit.

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 95 ways as a sum of consecutive naturals, for example, 368028631 + ... + 368031977.

It is an arithmetic number, because the mean of its divisors is an integer number (6909870240).

Almost surely, 2^{1231797427488} is an apocalyptic number.

1231797427488 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231797427488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1990042629120).

1231797427488 is an abundant number, since it is smaller than the sum of its proper divisors (2748287830752).

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

1231797427488 is a wasteful number, since it uses less digits than its factorization.

1231797427488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3491 (or 3471 counting only the distinct ones).

The product of its digits is 37933056, while the sum is 63.

The spelling of 1231797427488 in words is "one trillion, two hundred thirty-one billion, seven hundred ninety-seven million, four hundred twenty-seven thousand, four hundred eighty-eight".