640242016432161 has 32 divisors (see below), whose sum is σ = 1011771776276352. Its totient is φ = 355007640744960.

The previous prime is 640242016432153. The next prime is 640242016432169. The reversal of 640242016432161 is 161234610242046.

640242016432161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (640242016432153) and next prime (640242016432169).

It is not a de Polignac number, because 640242016432161 - 2³ = 640242016432153 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640242016432169) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6603516270 + ... + 6603613223.

It is an arithmetic number, because the mean of its divisors is an integer number (31617868008636).

Almost surely, 2^{640242016432161} is an apocalyptic number.

It is an amenable number.

640242016432161 is a deficient number, since it is larger than the sum of its proper divisors (371529759844191).

640242016432161 is a wasteful number, since it uses less digits than its factorization.

640242016432161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13207129633.

The product of its (nonzero) digits is 331776, while the sum is 42.

The spelling of 640242016432161 in words is "six hundred forty trillion, two hundred forty-two billion, sixteen million, four hundred thirty-two thousand, one hundred sixty-one".