640787407033 has 2 divisors, whose sum is σ = 640787407034. Its totient is φ = 640787407032.

The previous prime is 640787407021. The next prime is 640787407097. The reversal of 640787407033 is 330704787046.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 625763266704 + 15024140329 = 791052^2 + 122573^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640787407033 is a prime.

It is not a weakly prime, because it can be changed into another prime (640787407333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 320393703516 + 320393703517.

It is an arithmetic number, because the mean of its divisors is an integer number (320393703517).

Almost surely, 2^640787407033 is an apocalyptic number.

It is an amenable number.

640787407033 is a deficient number, since it is larger than the sum of its proper divisors (1).

640787407033 is an equidigital number, since it uses as much as digits as its factorization.

640787407033 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2370816, while the sum is 49.

The spelling of 640787407033 in words is "six hundred forty billion, seven hundred eighty-seven million, four hundred seven thousand, thirty-three".