640141312455 has 48 divisors (see below), whose sum is σ = 1113900933600. Its totient is φ = 340080678144.

The previous prime is 640141312453. The next prime is 640141312477. The reversal of 640141312455 is 554213141046.

640141312455 is a `hidden beast` number, since 6 + 401 + 4 + 1 + 3 + 1 + 245 + 5 = 666.

It is not a de Polignac number, because 640141312455 - 2¹ = 640141312453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640141312453) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15637444 + ... + 15678326.

It is an arithmetic number, because the mean of its divisors is an integer number (23206269450).

Almost surely, 2^640141312455 is an apocalyptic number.

640141312455 is a deficient number, since it is larger than the sum of its proper divisors (473759621145).

640141312455 is a wasteful number, since it uses less digits than its factorization.

640141312455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42240 (or 42237 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 640141312455 in words is "six hundred forty billion, one hundred forty-one million, three hundred twelve thousand, four hundred fifty-five".