201878568438 has 32 divisors (see below), whose sum is σ = 405716061696. Its totient is φ = 66967151328.

The previous prime is 201878568427. The next prime is 201878568481. The reversal of 201878568438 is 834865878102.

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, 938781 + ... + 1133607.

It is an arithmetic number, because the mean of its divisors is an integer number (12678626928).

Almost surely, 2^201878568438 is an apocalyptic number.

201878568438 is an abundant number, since it is smaller than the sum of its proper divisors (203837493258).

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

201878568438 is a wasteful number, since it uses less digits than its factorization.

201878568438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195668.

The product of its (nonzero) digits is 20643840, while the sum is 60.

The spelling of 201878568438 in words is "two hundred one billion, eight hundred seventy-eight million, five hundred sixty-eight thousand, four hundred thirty-eight".