188604855638394 has 64 divisors (see below), whose sum is σ = 416974881286656. Its totient is φ = 56509221694464.

The previous prime is 188604855638359. The next prime is 188604855638413. The reversal of 188604855638394 is 493836558406881.

It is a Harshad number since it is a multiple of its sum of digits (78).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 129854047 + ... + 131298450.

It is an arithmetic number, because the mean of its divisors is an integer number (6515232520104).

Almost surely, 2^{188604855638394} is an apocalyptic number.

188604855638394 is an abundant number, since it is smaller than the sum of its proper divisors (228370025648262).

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

188604855638394 is a wasteful number, since it uses less digits than its factorization.

188604855638394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 261152759.

The product of its (nonzero) digits is 4777574400, while the sum is 78.

The spelling of 188604855638394 in words is "one hundred eighty-eight trillion, six hundred four billion, eight hundred fifty-five million, six hundred thirty-eight thousand, three hundred ninety-four".