640225670183 has 4 divisors (see below), whose sum is σ = 698428003848. Its totient is φ = 582023336520.

The previous prime is 640225670171. The next prime is 640225670191. The reversal of 640225670183 is 381076522046.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 640225670183 - 2³² = 635930702887 is a prime.

It is a super-2 number, since 2×640225670183² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640225670083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29101166816 + ... + 29101166837.

It is an arithmetic number, because the mean of its divisors is an integer number (174607000962).

Almost surely, 2^640225670183 is an apocalyptic number.

640225670183 is a deficient number, since it is larger than the sum of its proper divisors (58202333665).

640225670183 is a wasteful number, since it uses less digits than its factorization.

640225670183 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58202333664.

The product of its (nonzero) digits is 483840, while the sum is 44.

The spelling of 640225670183 in words is "six hundred forty billion, two hundred twenty-five million, six hundred seventy thousand, one hundred eighty-three".