640413029279 has 8 divisors (see below), whose sum is σ = 649206396192. Its totient is φ = 631620218880.

The previous prime is 640413029261. The next prime is 640413029281. The reversal of 640413029279 is 972920314046.

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 640413029279 - 2⁸ = 640413029023 is a prime.

It is a super-2 number, since 2×640413029279² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640413029299) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2526239 + ... + 2768159.

It is an arithmetic number, because the mean of its divisors is an integer number (81150799524).

Almost surely, 2^640413029279 is an apocalyptic number.

640413029279 is a deficient number, since it is larger than the sum of its proper divisors (8793366913).

640413029279 is a wasteful number, since it uses less digits than its factorization.

640413029279 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 278257.

The product of its (nonzero) digits is 653184, while the sum is 47.

The spelling of 640413029279 in words is "six hundred forty billion, four hundred thirteen million, twenty-nine thousand, two hundred seventy-nine".