641333021161 has 32 divisors (see below), whose sum is σ = 780122568960. Its totient is φ = 514681122816.

The previous prime is 641333021141. The next prime is 641333021179. The reversal of 641333021161 is 161120333146.

641333021161 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 641333021161 - 2⁷ = 641333021033 is a prime.

It is a super-2 number, since 2×641333021161² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641333021141) 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, 17861935 + ... + 17897803.

It is an arithmetic number, because the mean of its divisors is an integer number (24378830280).

Almost surely, 2^641333021161 is an apocalyptic number.

It is an amenable number.

641333021161 is a deficient number, since it is larger than the sum of its proper divisors (138789547799).

641333021161 is a wasteful number, since it uses less digits than its factorization.

641333021161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36673.

The product of its (nonzero) digits is 7776, while the sum is 31.

The spelling of 641333021161 in words is "six hundred forty-one billion, three hundred thirty-three million, twenty-one thousand, one hundred sixty-one".