94681136209 has 15 divisors (see below), whose sum is σ = 104189574265. Its totient is φ = 86039912860.

The previous prime is 94681136203. The next prime is 94681136213. The reversal of 94681136209 is 90263118649.

It is a happy number.

The square root of 94681136209 is 307703.

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

It is not a de Polignac number, because 94681136209 - 2³ = 94681136201 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (94681136201) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 37230792 + ... + 37233334.

Almost surely, 2^94681136209 is an apocalyptic number.

94681136209 is the 307703-rd square number.

94681136209 is the 153852-nd centered octagonal number.

It is an amenable number.

94681136209 is a deficient number, since it is larger than the sum of its proper divisors (9508438056).

94681136209 is an frugal number, since it uses more digits than its factorization.

94681136209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5130 (or 2554 counting only the distinct ones).

The product of its (nonzero) digits is 559872, while the sum is 49.

Multiplying 94681136209 by its sum of digits (49), we get a square (4639375674241 = 2153921²).

The spelling of 94681136209 in words is "ninety-four billion, six hundred eighty-one million, one hundred thirty-six thousand, two hundred nine".