64405620161016 has 32 divisors (see below), whose sum is σ = 161135387370240. Its totient is φ = 21452361791328.

The previous prime is 64405620160979. The next prime is 64405620161027. The reversal of 64405620161016 is 61016102650446.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1011108886 + ... + 1011172581.

It is an arithmetic number, because the mean of its divisors is an integer number (5035480855320).

Almost surely, 2^{64405620161016} is an apocalyptic number.

It is an amenable number.

64405620161016 is an abundant number, since it is smaller than the sum of its proper divisors (96729767209224).

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

64405620161016 is a wasteful number, since it uses less digits than its factorization.

64405620161016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2022282803 (or 2022282799 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 42.

The spelling of 64405620161016 in words is "sixty-four trillion, four hundred five billion, six hundred twenty million, one hundred sixty-one thousand, sixteen".