201345778 has 8 divisors (see below), whose sum is σ = 302885100. Its totient is φ = 100384080.

The previous prime is 201345769. The next prime is 201345779. The reversal of 201345778 is 877543102.

It can be written as a sum of positive squares in 2 ways, for example, as 190633249 + 10712529 = 13807^2 + 3273^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (201345779) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143533 + ... + 144928.

Almost surely, 2^201345778 is an apocalyptic number.

201345778 is a deficient number, since it is larger than the sum of its proper divisors (101539322).

201345778 is a wasteful number, since it uses less digits than its factorization.

201345778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288812.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 201345778 is about 14189.6362885030. The cubic root of 201345778 is about 586.1123094272.

The spelling of 201345778 in words is "two hundred one million, three hundred forty-five thousand, seven hundred seventy-eight".