640141415 has 4 divisors (see below), whose sum is σ = 768169704. Its totient is φ = 512113128.

The previous prime is 640141391. The next prime is 640141417. The reversal of 640141415 is 514141046.

640141415 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640141415 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640141417) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64014137 + ... + 64014146.

It is an arithmetic number, because the mean of its divisors is an integer number (192042426).

Almost surely, 2^640141415 is an apocalyptic number.

640141415 is a deficient number, since it is larger than the sum of its proper divisors (128028289).

640141415 is a wasteful number, since it uses less digits than its factorization.

640141415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128028288.

The product of its (nonzero) digits is 1920, while the sum is 26.

The square root of 640141415 is about 25301.0160863156. The cubic root of 640141415 is about 861.8373441262.

The spelling of 640141415 in words is "six hundred forty million, one hundred forty-one thousand, four hundred fifteen".