640323243235 has 8 divisors (see below), whose sum is σ = 827494652880. Its totient is φ = 472854087264.

The previous prime is 640323243233. The next prime is 640323243269. The reversal of 640323243235 is 532342323046.

640323243235 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 640323243235 - 2¹ = 640323243233 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 640323243194 and 640323243203.

It is not an unprimeable number, because it can be changed into a prime (640323243233) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4925563345 + ... + 4925563474.

It is an arithmetic number, because the mean of its divisors is an integer number (103436831610).

Almost surely, 2^640323243235 is an apocalyptic number.

640323243235 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

640323243235 is a deficient number, since it is larger than the sum of its proper divisors (187171409645).

640323243235 is a wasteful number, since it uses less digits than its factorization.

640323243235 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9851126837.

The product of its (nonzero) digits is 311040, while the sum is 37.

The spelling of 640323243235 in words is "six hundred forty billion, three hundred twenty-three million, two hundred forty-three thousand, two hundred thirty-five".