140000187856 has 20 divisors (see below), whose sum is σ = 287206268292. Its totient is φ = 65882441216.

The previous prime is 140000187853. The next prime is 140000187863. The reversal of 140000187856 is 658781000041.

It can be written as a sum of positive squares in 2 ways, for example, as 75616200256 + 64383987600 = 274984^2 + 253740^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (140000187853) 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, 257353015 + ... + 257353558.

Almost surely, 2^140000187856 is an apocalyptic number.

140000187856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

140000187856 is an abundant number, since it is smaller than the sum of its proper divisors (147206080436).

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

140000187856 is a wasteful number, since it uses less digits than its factorization.

140000187856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 514706598 (or 514706592 counting only the distinct ones).

The product of its (nonzero) digits is 53760, while the sum is 40.

Adding to 140000187856 its reverse (658781000041), we get a palindrome (798781187897).

The spelling of 140000187856 in words is "one hundred forty billion, one hundred eighty-seven thousand, eight hundred fifty-six".