640462614406 has 16 divisors (see below), whose sum is σ = 965791868400. Its totient is φ = 318532405248.

The previous prime is 640462614397. The next prime is 640462614409. The reversal of 640462614406 is 604416264046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640462614409) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3131305 + ... + 3329563.

It is an arithmetic number, because the mean of its divisors is an integer number (60361991775).

Almost surely, 2^640462614406 is an apocalyptic number.

640462614406 is a deficient number, since it is larger than the sum of its proper divisors (325329253994).

640462614406 is a wasteful number, since it uses less digits than its factorization.

640462614406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206823.

The product of its (nonzero) digits is 663552, while the sum is 43.

The spelling of 640462614406 in words is "six hundred forty billion, four hundred sixty-two million, six hundred fourteen thousand, four hundred six".