202040246640 has 80 divisors (see below), whose sum is σ = 636940483200. Its totient is φ = 52964219136.

The previous prime is 202040246599. The next prime is 202040246657. The reversal of 202040246640 is 46642040202.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×202040246640² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 202040246598 and 202040246607.

It is a congruent number.

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, 7120030 + ... + 7148349.

It is an arithmetic number, because the mean of its divisors is an integer number (7961756040).

Almost surely, 2^202040246640 is an apocalyptic number.

202040246640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202040246640 is an abundant number, since it is smaller than the sum of its proper divisors (434900236560).

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

202040246640 is a wasteful number, since it uses less digits than its factorization.

202040246640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14268454 (or 14268448 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 30.

Adding to 202040246640 its reverse (46642040202), we get a palindrome (248682286842).

The spelling of 202040246640 in words is "two hundred two billion, forty million, two hundred forty-six thousand, six hundred forty".