640054265 has 8 divisors (see below), whose sum is σ = 768259968. Its totient is φ = 511913520.

The previous prime is 640054237. The next prime is 640054297. The reversal of 640054265 is 562450046.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 640054265 - 2⁶ = 640054201 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9014 + ... + 36896.

It is an arithmetic number, because the mean of its divisors is an integer number (96032496).

Almost surely, 2^640054265 is an apocalyptic number.

It is an amenable number.

640054265 is a deficient number, since it is larger than the sum of its proper divisors (128205703).

640054265 is a wasteful number, since it uses less digits than its factorization.

640054265 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32479.

The product of its (nonzero) digits is 28800, while the sum is 32.

The square root of 640054265 is about 25299.2937648465. The cubic root of 640054265 is about 861.7982316574.

The spelling of 640054265 in words is "six hundred forty million, fifty-four thousand, two hundred sixty-five".