640054011 has 8 divisors (see below), whose sum is σ = 873252160. Its totient is φ = 416779272.

The previous prime is 640054003. The next prime is 640054021. The reversal of 640054011 is 110450046.

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

It is not a de Polignac number, because 640054011 - 2³ = 640054003 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (640054001) by changing a digit.

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, 2480701 + ... + 2480958.

It is an arithmetic number, because the mean of its divisors is an integer number (109156520).

Almost surely, 2^640054011 is an apocalyptic number.

640054011 is a deficient number, since it is larger than the sum of its proper divisors (233198149).

640054011 is a wasteful number, since it uses less digits than its factorization.

640054011 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4961705.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 640054011 is about 25299.2887449430. The cubic root of 640054011 is about 861.7981176583.

The spelling of 640054011 in words is "six hundred forty million, fifty-four thousand, eleven".