1238917668450 has 288 divisors, whose sum is σ = 3965175141120. Its totient is φ = 253073116800.

The previous prime is 1238917668437. The next prime is 1238917668479. The reversal of 1238917668450 is 548667198321.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 4640289 + ... + 4900011.

It is an arithmetic number, because the mean of its divisors is an integer number (13767969240).

It is a 1-persistent number, because it is pandigital, but 2⋅1238917668450 = 2477835336900 is not.

Almost surely, 2^{1238917668450} is an apocalyptic number.

1238917668450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1238917668450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1982587570560).

1238917668450 is an abundant number, since it is smaller than the sum of its proper divisors (2726257472670).

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

1238917668450 is a wasteful number, since it uses less digits than its factorization.

1238917668450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 259822 (or 259810 counting only the distinct ones).

The product of its (nonzero) digits is 17418240, while the sum is 60.

The spelling of 1238917668450 in words is "one trillion, two hundred thirty-eight billion, nine hundred seventeen million, six hundred sixty-eight thousand, four hundred fifty".