674788178538 has 48 divisors (see below), whose sum is σ = 1520724471552. Its totient is φ = 216011952000.

The previous prime is 674788178531. The next prime is 674788178579. The reversal of 674788178538 is 835871887476.

It is a happy number.

674788178538 is a `hidden beast` number, since 6 + 7 + 4 + 7 + 8 + 81 + 7 + 8 + 538 = 666.

It is not an unprimeable number, because it can be changed into a prime (674788178531) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4542543 + ... + 4688738.

It is an arithmetic number, because the mean of its divisors is an integer number (31681759824).

Almost surely, 2^674788178538 is an apocalyptic number.

674788178538 is an abundant number, since it is smaller than the sum of its proper divisors (845936293014).

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

674788178538 is a wasteful number, since it uses less digits than its factorization.

674788178538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9231451 (or 9231448 counting only the distinct ones).

The product of its digits is 505774080, while the sum is 72.

The spelling of 674788178538 in words is "six hundred seventy-four billion, seven hundred eighty-eight million, one hundred seventy-eight thousand, five hundred thirty-eight".