640885203 has 40 divisors (see below), whose sum is σ = 1096457472. Its totient is φ = 365444784.

The previous prime is 640885183. The next prime is 640885211. The reversal of 640885203 is 302588046.

640885203 is a `hidden beast` number, since 640 + 8 + 8 + 5 + 2 + 0 + 3 = 666.

It is not a de Polignac number, because 640885203 - 2⁶ = 640885139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (640885213) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 365976 + ... + 367722.

Almost surely, 2^640885203 is an apocalyptic number.

640885203 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

640885203 is a deficient number, since it is larger than the sum of its proper divisors (455572269).

640885203 is a wasteful number, since it uses less digits than its factorization.

640885203 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2413 (or 2404 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 36.

The square root of 640885203 is about 25315.7105963866. The cubic root of 640885203 is about 862.1710079846.

The spelling of 640885203 in words is "six hundred forty million, eight hundred eighty-five thousand, two hundred three".