678150435221 has 8 divisors (see below), whose sum is σ = 800030006784. Its totient is φ = 562521098160.

The previous prime is 678150435203. The next prime is 678150435227. The reversal of 678150435221 is 122534051876.

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

It is a de Polignac number, because none of the positive numbers 2^k-678150435221 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678150435227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1562558390 + ... + 1562558823.

It is an arithmetic number, because the mean of its divisors is an integer number (100003750848).

Almost surely, 2^678150435221 is an apocalyptic number.

It is an amenable number.

678150435221 is a deficient number, since it is larger than the sum of its proper divisors (121879571563).

678150435221 is a wasteful number, since it uses less digits than its factorization.

678150435221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3125117251.

The product of its (nonzero) digits is 403200, while the sum is 44.

The spelling of 678150435221 in words is "six hundred seventy-eight billion, one hundred fifty million, four hundred thirty-five thousand, two hundred twenty-one".