194872805136 has 45 divisors (see below), whose sum is σ = 545388023271. Its totient is φ = 64955835936.

The previous prime is 194872805069. The next prime is 194872805161. The reversal of 194872805136 is 631508278491.

The square root of 194872805136 is 441444.

It is a perfect power (a square), and thus also a powerful number.

194872805136 is a `hidden beast` number, since 1 + 9 + 48 + 7 + 2 + 80 + 513 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 5278935 + ... + 5315721.

It is a 2-persistent number, because it is pandigital, and so is 2⋅194872805136 = 389745610272, but 3⋅194872805136 = 584618415408 is not.

Almost surely, 2^194872805136 is an apocalyptic number.

194872805136 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

194872805136 is the 441444-th square number.

It is an amenable number.

194872805136 is an abundant number, since it is smaller than the sum of its proper divisors (350515218135).

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

194872805136 is an frugal number, since it uses more digits than its factorization.

194872805136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73588 (or 36792 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The spelling of 194872805136 in words is "one hundred ninety-four billion, eight hundred seventy-two million, eight hundred five thousand, one hundred thirty-six".