645633341163 has 64 divisors (see below), whose sum is σ = 996780687360. Its totient is φ = 412576675200.

The previous prime is 645633341147. The next prime is 645633341179. The reversal of 645633341163 is 361143336546.

It is a happy number.

645633341163 is a `hidden beast` number, since 6 + 4 + 5 + 633 + 3 + 4 + 1 + 1 + 6 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (645633341147) and next prime (645633341179).

It is not a de Polignac number, because 645633341163 - 2⁴ = 645633341147 is a prime.

It is a super-2 number, since 2×645633341163² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645633341663) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 39232845 + ... + 39249297.

It is an arithmetic number, because the mean of its divisors is an integer number (15574698240).

Almost surely, 2^645633341163 is an apocalyptic number.

645633341163 is a deficient number, since it is larger than the sum of its proper divisors (351147346197).

645633341163 is a wasteful number, since it uses less digits than its factorization.

645633341163 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16937 (or 16931 counting only the distinct ones).

The product of its digits is 1399680, while the sum is 45.

The spelling of 645633341163 in words is "six hundred forty-five billion, six hundred thirty-three million, three hundred forty-one thousand, one hundred sixty-three".