640200262020 has 48 divisors (see below), whose sum is σ = 1955520802368. Its totient is φ = 155200063360.

The previous prime is 640200262003. The next prime is 640200262049. The reversal of 640200262020 is 20262002046.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484999539 + ... + 485000858.

It is an arithmetic number, because the mean of its divisors is an integer number (40740016716).

Almost surely, 2^640200262020 is an apocalyptic number.

640200262020 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

640200262020 is an abundant number, since it is smaller than the sum of its proper divisors (1315320540348).

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

640200262020 is a wasteful number, since it uses less digits than its factorization.

640200262020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 970000420 (or 970000418 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

Adding to 640200262020 its reverse (20262002046), we get a palindrome (660462264066).

It can be divided in two parts, 64020026 and 2020, that added together give a palindrome (64022046).

The spelling of 640200262020 in words is "six hundred forty billion, two hundred million, two hundred sixty-two thousand, twenty".