640121165465314 has 32 divisors (see below), whose sum is σ = 1096765394192496. Its totient is φ = 277579773296640.

The previous prime is 640121165465269. The next prime is 640121165465321. The reversal of 640121165465314 is 413564561121046.

640121165465314 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 8 ways, for example, as 324013212134689 + 316107953330625 = 18000367^2 + 17779425^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1254717177 + ... + 1255227244.

Almost surely, 2^{640121165465314} is an apocalyptic number.

640121165465314 is a deficient number, since it is larger than the sum of its proper divisors (456644228727182).

640121165465314 is a wasteful number, since it uses less digits than its factorization.

640121165465314 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2509945030.

The product of its (nonzero) digits is 2073600, while the sum is 49.

The spelling of 640121165465314 in words is "six hundred forty trillion, one hundred twenty-one billion, one hundred sixty-five million, four hundred sixty-five thousand, three hundred fourteen".