640198053 has 48 divisors (see below), whose sum is σ = 1103921280. Its totient is φ = 365143680.

The previous prime is 640198043. The next prime is 640198057. The reversal of 640198053 is 350891046.

640198053 is a `hidden beast` number, since 640 + 1 + 9 + 8 + 0 + 5 + 3 = 666.

It is not a de Polignac number, because 640198053 - 2⁴ = 640198037 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 640197999 and 640198017.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (640198057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 49776 + ... + 61302.

It is an arithmetic number, because the mean of its divisors is an integer number (22998360).

Almost surely, 2^640198053 is an apocalyptic number.

It is an amenable number.

640198053 is a deficient number, since it is larger than the sum of its proper divisors (463723227).

640198053 is a wasteful number, since it uses less digits than its factorization.

640198053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11575 (or 11558 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 640198053 is about 25302.1353446700. The cubic root of 640198053 is about 861.8627610642.

The spelling of 640198053 in words is "six hundred forty million, one hundred ninety-eight thousand, fifty-three".