202578640056 has 48 divisors (see below), whose sum is σ = 590854369560. Its totient is φ = 62331888960.

The previous prime is 202578640051. The next prime is 202578640139. The reversal of 202578640056 is 650046875202.

202578640056 is a `hidden beast` number, since 20 + 2 + 578 + 6 + 4 + 0 + 0 + 56 = 666.

202578640056 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 202578639993 and 202578640020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (202578640051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108214150 + ... + 108216021.

Almost surely, 2^202578640056 is an apocalyptic number.

202578640056 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

202578640056 is an abundant number, since it is smaller than the sum of its proper divisors (388275729504).

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

202578640056 is a wasteful number, since it uses less digits than its factorization.

202578640056 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216430196 (or 216430189 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 202578640056 in words is "two hundred two billion, five hundred seventy-eight million, six hundred forty thousand, fifty-six".