640616425606 has 8 divisors (see below), whose sum is σ = 961077890304. Its totient is φ = 320257128840.

The previous prime is 640616425583. The next prime is 640616425661. The reversal of 640616425606 is 606524616046.

640616425606 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25526305 + ... + 25551388.

It is an arithmetic number, because the mean of its divisors is an integer number (120134736288).

Almost surely, 2^640616425606 is an apocalyptic number.

640616425606 is a deficient number, since it is larger than the sum of its proper divisors (320461464698).

640616425606 is a wasteful number, since it uses less digits than its factorization.

640616425606 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51083966.

The product of its (nonzero) digits is 1244160, while the sum is 46.

The spelling of 640616425606 in words is "six hundred forty billion, six hundred sixteen million, four hundred twenty-five thousand, six hundred six".