640140463422 has 48 divisors (see below), whose sum is σ = 1499428142160. Its totient is φ = 196686112896.

The previous prime is 640140463411. The next prime is 640140463423. The reversal of 640140463422 is 224364041046.

640140463422 is a `hidden beast` number, since 6 + 4 + 0 + 14 + 0 + 4 + 634 + 2 + 2 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640140463423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25281343 + ... + 25306650.

It is an arithmetic number, because the mean of its divisors is an integer number (31238086295).

Almost surely, 2^640140463422 is an apocalyptic number.

640140463422 is an abundant number, since it is smaller than the sum of its proper divisors (859287678738).

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

640140463422 is a wasteful number, since it uses less digits than its factorization.

640140463422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50588057 (or 50588054 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 36.

The spelling of 640140463422 in words is "six hundred forty billion, one hundred forty million, four hundred sixty-three thousand, four hundred twenty-two".