640043358702 has 32 divisors (see below), whose sum is σ = 1397540110464. Its totient is φ = 193802272800.

The previous prime is 640043358679. The next prime is 640043358709. The reversal of 640043358702 is 207853340046.

640043358702 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×640043358702³ (a number of 36 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640043358709) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3670653 + ... + 3841064.

It is an arithmetic number, because the mean of its divisors is an integer number (43673128452).

Almost surely, 2^640043358702 is an apocalyptic number.

640043358702 is an abundant number, since it is smaller than the sum of its proper divisors (757496751762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640043358702 is a wasteful number, since it uses less digits than its factorization.

640043358702 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7513024.

The product of its (nonzero) digits is 483840, while the sum is 42.

Adding to 640043358702 its reverse (207853340046), we get a palindrome (847896698748).

The spelling of 640043358702 in words is "six hundred forty billion, forty-three million, three hundred fifty-eight thousand, seven hundred two".