640525614034 has 8 divisors (see below), whose sum is σ = 986755675788. Its totient is φ = 311607055440.

The previous prime is 640525614023. The next prime is 640525614061. The reversal of 640525614034 is 430416525046.

It can be written as a sum of positive squares in 2 ways, for example, as 640520105625 + 5508409 = 800325^2 + 2347^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4327875697 + ... + 4327875844.

Almost surely, 2^640525614034 is an apocalyptic number.

640525614034 is a deficient number, since it is larger than the sum of its proper divisors (346230061754).

640525614034 is a wasteful number, since it uses less digits than its factorization.

640525614034 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8655751580.

The product of its (nonzero) digits is 345600, while the sum is 40.

The spelling of 640525614034 in words is "six hundred forty billion, five hundred twenty-five million, six hundred fourteen thousand, thirty-four".