202642026640 has 20 divisors (see below), whose sum is σ = 471142712124. Its totient is φ = 81056810624.

The previous prime is 202642026593. The next prime is 202642026661. The reversal of 202642026640 is 46620246202.

It can be written as a sum of positive squares in 2 ways, for example, as 30556438416 + 172085588224 = 174804^2 + 414832^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a junction number, because it is equal to n+sod(n) for n = 202642026596 and 202642026605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266512587 + ... + 1266512746.

Almost surely, 2^202642026640 is an apocalyptic number.

202642026640 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

202642026640 is an abundant number, since it is smaller than the sum of its proper divisors (268500685484).

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

202642026640 is a wasteful number, since it uses less digits than its factorization.

202642026640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2533025346 (or 2533025340 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

The spelling of 202642026640 in words is "two hundred two billion, six hundred forty-two million, twenty-six thousand, six hundred forty".