140438421855 has 24 divisors (see below), whose sum is σ = 243458648160. Its totient is φ = 74890630080.

The previous prime is 140438421821. The next prime is 140438421859. The reversal of 140438421855 is 558124834041.

140438421855 is a `hidden beast` number, since 1 + 4 + 0 + 4 + 384 + 218 + 55 = 666.

It is not a de Polignac number, because 140438421855 - 2¹⁶ = 140438356319 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 140438421855.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140438421859) 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, 146766 + ... + 549924.

It is an arithmetic number, because the mean of its divisors is an integer number (10144110340).

Almost surely, 2^140438421855 is an apocalyptic number.

140438421855 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

140438421855 is a deficient number, since it is larger than the sum of its proper divisors (103020226305).

140438421855 is a wasteful number, since it uses less digits than its factorization.

140438421855 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 410911 (or 410908 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 45.

The spelling of 140438421855 in words is "one hundred forty billion, four hundred thirty-eight million, four hundred twenty-one thousand, eight hundred fifty-five".