201778416 has 60 divisors (see below), whose sum is σ = 645373872. Its totient is φ = 57650688.

The previous prime is 201778387. The next prime is 201778417. The reversal of 201778416 is 614877102.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201778417) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 99081 + ... + 101096.

Almost surely, 2^201778416 is an apocalyptic number.

It is an amenable number.

201778416 is an abundant number, since it is smaller than the sum of its proper divisors (443595456).

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

201778416 is a wasteful number, since it uses less digits than its factorization.

201778416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200198 (or 200189 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 201778416 is about 14204.8729666970. The cubic root of 201778416 is about 586.5318084191.

The spelling of 201778416 in words is "two hundred one million, seven hundred seventy-eight thousand, four hundred sixteen".