640522276573 has 4 divisors (see below), whose sum is σ = 674233975360. Its totient is φ = 606810577788.

The previous prime is 640522276547. The next prime is 640522276577. The reversal of 640522276573 is 375672225046.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-640522276573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640522276577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16855849365 + ... + 16855849402.

It is an arithmetic number, because the mean of its divisors is an integer number (168558493840).

Almost surely, 2^640522276573 is an apocalyptic number.

It is an amenable number.

640522276573 is a deficient number, since it is larger than the sum of its proper divisors (33711698787).

640522276573 is a wasteful number, since it uses less digits than its factorization.

640522276573 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33711698786.

The product of its (nonzero) digits is 4233600, while the sum is 49.

The spelling of 640522276573 in words is "six hundred forty billion, five hundred twenty-two million, two hundred seventy-six thousand, five hundred seventy-three".