188209000681492 has 72 divisors (see below), whose sum is σ = 386984151197280. Its totient is φ = 79851863246400.

The previous prime is 188209000681477. The next prime is 188209000681519. The reversal of 188209000681492 is 294186000902881.

It is a super-2 number, since 2×188209000681492² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 150678859 + ... + 151922797.

It is an arithmetic number, because the mean of its divisors is an integer number (5374779877740).

Almost surely, 2^{188209000681492} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 188209000681492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193492075598640).

188209000681492 is an abundant number, since it is smaller than the sum of its proper divisors (198775150515788).

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

188209000681492 is a wasteful number, since it uses less digits than its factorization.

188209000681492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1251701 (or 1251692 counting only the distinct ones).

The product of its (nonzero) digits is 3981312, while the sum is 58.

The spelling of 188209000681492 in words is "one hundred eighty-eight trillion, two hundred nine billion, six hundred eighty-one thousand, four hundred ninety-two".