640773033 has 16 divisors (see below), whose sum is σ = 865080000. Its totient is φ = 421836800.

The previous prime is 640773019. The next prime is 640773041. The reversal of 640773033 is 330377046.

640773033 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 640773033 - 2¹⁶ = 640707497 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 640772985 and 640773003.

It is not an unprimeable number, because it can be changed into a prime (640774033) 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, 399433 + ... + 401033.

It is an arithmetic number, because the mean of its divisors is an integer number (54067500).

Almost surely, 2^640773033 is an apocalyptic number.

It is an amenable number.

640773033 is a deficient number, since it is larger than the sum of its proper divisors (224306967).

640773033 is a wasteful number, since it uses less digits than its factorization.

640773033 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3192.

The product of its (nonzero) digits is 31752, while the sum is 33.

The square root of 640773033 is about 25313.4950767372. The cubic root of 640773033 is about 862.1207049744.

The spelling of 640773033 in words is "six hundred forty million, seven hundred seventy-three thousand, thirty-three".