640842600510 has 128 divisors (see below), whose sum is σ = 1955202647040. Its totient is φ = 146316419712.

The previous prime is 640842600443. The next prime is 640842600539. The reversal of 640842600510 is 15006248046.

640842600510 is a `hidden beast` number, since 6 + 4 + 0 + 8 + 42 + 600 + 5 + 1 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

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 63 ways as a sum of consecutive naturals, for example, 1527312 + ... + 1901148.

It is an arithmetic number, because the mean of its divisors is an integer number (15275020680).

Almost surely, 2^640842600510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 640842600510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (977601323520).

640842600510 is an abundant number, since it is smaller than the sum of its proper divisors (1314360046530).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640842600510 is a wasteful number, since it uses less digits than its factorization.

640842600510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 374767 (or 374761 counting only the distinct ones).

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

Adding to 640842600510 its reverse (15006248046), we get a palindrome (655848848556).

The spelling of 640842600510 in words is "six hundred forty billion, eight hundred forty-two million, six hundred thousand, five hundred ten".