202640602440 has 64 divisors (see below), whose sum is σ = 611651448000. Its totient is φ = 53705970432.

The previous prime is 202640602433. The next prime is 202640602481. The reversal of 202640602440 is 44206046202.

It is a super-2 number, since 2×202640602440² (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 = 202640602398 and 202640602407.

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, 5160415 + ... + 5199534.

It is an arithmetic number, because the mean of its divisors is an integer number (9557053875).

Almost surely, 2^202640602440 is an apocalyptic number.

202640602440 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202640602440 is an abundant number, since it is smaller than the sum of its proper divisors (409010845560).

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

202640602440 is a wasteful number, since it uses less digits than its factorization.

202640602440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10360126 (or 10360122 counting only the distinct ones).

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

Adding to 202640602440 its reverse (44206046202), we get a palindrome (246846648642).

The spelling of 202640602440 in words is "two hundred two billion, six hundred forty million, six hundred two thousand, four hundred forty".