640594127 has 8 divisors (see below), whose sum is σ = 662355792. Its totient is φ = 619124800.

The previous prime is 640594121. The next prime is 640594151. The reversal of 640594127 is 721495046.

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

It is a cyclic number.

It is not a de Polignac number, because 640594127 - 2¹² = 640590031 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 (640594121) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68624 + ... + 77397.

It is an arithmetic number, because the mean of its divisors is an integer number (82794474).

Almost surely, 2^640594127 is an apocalyptic number.

640594127 is a deficient number, since it is larger than the sum of its proper divisors (21761665).

640594127 is a wasteful number, since it uses less digits than its factorization.

640594127 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146169.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 640594127 is about 25309.9610232809. The cubic root of 640594127 is about 862.0404618328.

It can be divided in two parts, 64059 and 4127, that added together give a palindrome (68186).

The spelling of 640594127 in words is "six hundred forty million, five hundred ninety-four thousand, one hundred twenty-seven".