202578640055 has 16 divisors (see below), whose sum is σ = 268173568800. Its totient is φ = 145674524160.

The previous prime is 202578640051. The next prime is 202578640139. The reversal of 202578640055 is 550046875202.

It is not a de Polignac number, because 202578640055 - 2² = 202578640051 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 202578639988 and 202578640015.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20687510 + ... + 20697299.

It is an arithmetic number, because the mean of its divisors is an integer number (16760848050).

Almost surely, 2^202578640055 is an apocalyptic number.

202578640055 is a deficient number, since it is larger than the sum of its proper divisors (65594928745).

202578640055 is a wasteful number, since it uses less digits than its factorization.

202578640055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41384914.

The product of its (nonzero) digits is 672000, while the sum is 44.

The spelling of 202578640055 in words is "two hundred two billion, five hundred seventy-eight million, six hundred forty thousand, fifty-five".