641440355047 has 16 divisors (see below), whose sum is σ = 714973106880. Its totient is φ = 572350062592.

The previous prime is 641440355027. The next prime is 641440355051. The reversal of 641440355047 is 740553044146.

641440355047 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 641440355047 - 2¹⁵ = 641440322279 is a prime.

It is a super-2 number, since 2×641440355047² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 641440354994 and 641440355012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (641440355027) 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, 7214722 + ... + 7303087.

It is an arithmetic number, because the mean of its divisors is an integer number (44685819180).

Almost surely, 2^641440355047 is an apocalyptic number.

641440355047 is a deficient number, since it is larger than the sum of its proper divisors (73532751833).

641440355047 is a wasteful number, since it uses less digits than its factorization.

641440355047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14517962.

The product of its (nonzero) digits is 806400, while the sum is 43.

The spelling of 641440355047 in words is "six hundred forty-one billion, four hundred forty million, three hundred fifty-five thousand, forty-seven".