640414430055 has 16 divisors (see below), whose sum is σ = 1138514542560. Its totient is φ = 341554362624.

The previous prime is 640414430041. The next prime is 640414430057. The reversal of 640414430055 is 550034414046.

640414430055 is a `hidden beast` number, since 640 + 4 + 1 + 4 + 4 + 3 + 0 + 0 + 5 + 5 = 666.

It is not a de Polignac number, because 640414430055 - 2¹¹ = 640414428007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640414430057) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2371905162 + ... + 2371905431.

It is an arithmetic number, because the mean of its divisors is an integer number (71157158910).

Almost surely, 2^640414430055 is an apocalyptic number.

640414430055 is a deficient number, since it is larger than the sum of its proper divisors (498100112505).

640414430055 is a wasteful number, since it uses less digits than its factorization.

640414430055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4743810607 (or 4743810601 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 640414430055 in words is "six hundred forty billion, four hundred fourteen million, four hundred thirty thousand, fifty-five".