140405312646 has 24 divisors (see below), whose sum is σ = 322106306184. Its totient is φ = 44048725440.

The previous prime is 140405312639. The next prime is 140405312651. The reversal of 140405312646 is 646213504041.

140405312646 is a `hidden beast` number, since 1 + 4 + 0 + 4 + 0 + 5 + 3 + 1 + 2 + 646 = 666.

It is a self number, because there is not a number n which added to its sum of digits gives 140405312646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 229420140 + ... + 229420751.

It is an arithmetic number, because the mean of its divisors is an integer number (13421096091).

Almost surely, 2^140405312646 is an apocalyptic number.

140405312646 is an abundant number, since it is smaller than the sum of its proper divisors (181700993538).

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

140405312646 is a wasteful number, since it uses less digits than its factorization.

140405312646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 458840916 (or 458840913 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 140405312646 its reverse (646213504041), we get a palindrome (786618816687).

The spelling of 140405312646 in words is "one hundred forty billion, four hundred five million, three hundred twelve thousand, six hundred forty-six".