640114478929 has 8 divisors (see below), whose sum is σ = 661044464640. Its totient is φ = 619202064000.

The previous prime is 640114478921. The next prime is 640114478957. The reversal of 640114478929 is 929874411046.

It is a happy number.

640114478929 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 cyclic number.

It is not a de Polignac number, because 640114478929 - 2³ = 640114478921 is a prime.

It is a super-2 number, since 2×640114478929² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 640114478929.

It is not an unprimeable number, because it can be changed into a prime (640114478921) 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, 4318624 + ... + 4464385.

It is an arithmetic number, because the mean of its divisors is an integer number (82630558080).

Almost surely, 2^640114478929 is an apocalyptic number.

It is an amenable number.

640114478929 is a deficient number, since it is larger than the sum of its proper divisors (20929985711).

640114478929 is a wasteful number, since it uses less digits than its factorization.

640114478929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8785391.

The product of its (nonzero) digits is 3483648, while the sum is 55.

The spelling of 640114478929 in words is "six hundred forty billion, one hundred fourteen million, four hundred seventy-eight thousand, nine hundred twenty-nine".