140640240136 has 32 divisors (see below), whose sum is σ = 291613960800. Its totient is φ = 63051661440.

The previous prime is 140640240133. The next prime is 140640240149. The reversal of 140640240136 is 631042046041.

It is a junction number, because it is equal to n+sod(n) for n = 140640240098 and 140640240107.

It is not an unprimeable number, because it can be changed into a prime (140640240133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10940046 + ... + 10952893.

It is an arithmetic number, because the mean of its divisors is an integer number (9112936275).

Almost surely, 2^140640240136 is an apocalyptic number.

It is an amenable number.

140640240136 is an abundant number, since it is smaller than the sum of its proper divisors (150973720664).

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

140640240136 is a wasteful number, since it uses less digits than its factorization.

140640240136 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21893029 (or 21893025 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

Adding to 140640240136 its reverse (631042046041), we get a palindrome (771682286177).

The spelling of 140640240136 in words is "one hundred forty billion, six hundred forty million, two hundred forty thousand, one hundred thirty-six".