202978899378 has 80 divisors (see below), whose sum is σ = 459502243200. Its totient is φ = 66964325184.

The previous prime is 202978899359. The next prime is 202978899407. The reversal of 202978899378 is 873998879202.

202978899378 is a `hidden beast` number, since 2 + 0 + 2 + 97 + 88 + 99 + 378 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 57548251 + ... + 57551777.

It is an arithmetic number, because the mean of its divisors is an integer number (5743778040).

Almost surely, 2^202978899378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 202978899378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (229751121600).

202978899378 is an abundant number, since it is smaller than the sum of its proper divisors (256523343822).

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

202978899378 is a wasteful number, since it uses less digits than its factorization.

202978899378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7093 (or 7084 counting only the distinct ones).

The product of its (nonzero) digits is 219469824, while the sum is 72.

The spelling of 202978899378 in words is "two hundred two billion, nine hundred seventy-eight million, eight hundred ninety-nine thousand, three hundred seventy-eight".