140344420121550 has 144 divisors (see below), whose sum is σ = 397312650184320. Its totient is φ = 35418916008000.

The previous prime is 140344420121497. The next prime is 140344420121663. The reversal of 140344420121550 is 55121024443041.

140344420121550 is a `hidden beast` number, since 1 + 4 + 0 + 3 + 44 + 42 + 0 + 1 + 21 + 550 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 150346 + ... + 16754445.

It is an arithmetic number, because the mean of its divisors is an integer number (2759115626280).

Almost surely, 2^{140344420121550} is an apocalyptic number.

140344420121550 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 140344420121550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (198656325092160).

140344420121550 is an abundant number, since it is smaller than the sum of its proper divisors (256968230062770).

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

140344420121550 is a wasteful number, since it uses less digits than its factorization.

140344420121550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16905799 (or 16905791 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

Adding to 140344420121550 its reverse (55121024443041), we get a palindrome (195465444564591).

The spelling of 140344420121550 in words is "one hundred forty trillion, three hundred forty-four billion, four hundred twenty million, one hundred twenty-one thousand, five hundred fifty".