640329441122 has 18 divisors (see below), whose sum is σ = 1117323357633. Its totient is φ = 274423508352.

The previous prime is 640329441119. The next prime is 640329441197. The reversal of 640329441122 is 221144923046.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 640305636481 + 23804641 = 800191^2 + 4879^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=565831.

It is a super-2 number, since 2×640329441122² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 7881218 + ... + 7962050.

Almost surely, 2^640329441122 is an apocalyptic number.

640329441122 is a deficient number, since it is larger than the sum of its proper divisors (476993916511).

640329441122 is an frugal number, since it uses more digits than its factorization.

640329441122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161682 (or 80842 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 38.

The spelling of 640329441122 in words is "six hundred forty billion, three hundred twenty-nine million, four hundred forty-one thousand, one hundred twenty-two".