201678678 has 12 divisors (see below), whose sum is σ = 436970508. Its totient is φ = 67226220.

The previous prime is 201678649. The next prime is 201678679. The reversal of 201678678 is 876876102.

201678678 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (201678679) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 5602168 + ... + 5602203.

It is an arithmetic number, because the mean of its divisors is an integer number (36414209).

Almost surely, 2^201678678 is an apocalyptic number.

201678678 is an abundant number, since it is smaller than the sum of its proper divisors (235291830).

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

201678678 is a wasteful number, since it uses less digits than its factorization.

201678678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11204379 (or 11204376 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 201678678 is about 14201.3618361057. The cubic root of 201678678 is about 586.4351526387.

The spelling of 201678678 in words is "two hundred one million, six hundred seventy-eight thousand, six hundred seventy-eight".