640550724415 has 16 divisors (see below), whose sum is σ = 878596315200. Its totient is φ = 439171407360.

The previous prime is 640550724349. The next prime is 640550724433. The reversal of 640550724415 is 514427055046.

It is not a de Polignac number, because 640550724415 - 2⁷ = 640550724287 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1073626 + ... + 1560055.

It is an arithmetic number, because the mean of its divisors is an integer number (54912269700).

Almost surely, 2^640550724415 is an apocalyptic number.

640550724415 is a deficient number, since it is larger than the sum of its proper divisors (238045590785).

640550724415 is a wasteful number, since it uses less digits than its factorization.

640550724415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2640642.

The product of its (nonzero) digits is 672000, while the sum is 43.

The spelling of 640550724415 in words is "six hundred forty billion, five hundred fifty million, seven hundred twenty-four thousand, four hundred fifteen".