641368654729 has 16 divisors (see below), whose sum is σ = 706554336384. Its totient is φ = 577330934400.

The previous prime is 641368654697. The next prime is 641368654747. The reversal of 641368654729 is 927456863146.

It is not a de Polignac number, because 641368654729 - 2⁵ = 641368654697 is a prime.

It is a super-2 number, since 2×641368654729² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (641368654799) 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, 10689397 + ... + 10749229.

It is an arithmetic number, because the mean of its divisors is an integer number (44159646024).

Almost surely, 2^641368654729 is an apocalyptic number.

It is an amenable number.

641368654729 is a deficient number, since it is larger than the sum of its proper divisors (65185681655).

641368654729 is a wasteful number, since it uses less digits than its factorization.

641368654729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69408.

The product of its digits is 52254720, while the sum is 61.

The spelling of 641368654729 in words is "six hundred forty-one billion, three hundred sixty-eight million, six hundred fifty-four thousand, seven hundred twenty-nine".