3912654109849 has 27 divisors (see below), whose sum is σ = 4045245216093. Its totient is φ = 3784360218912.

The previous prime is 3912654109843. The next prime is 3912654109867. The reversal of 3912654109849 is 9489014562193.

The square root of 3912654109849 is 1978043.

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

It can be written as a sum of positive squares in 4 ways, for example, as 429951669849 + 3482702440000 = 655707^2 + 1866200^2 .

It is not a de Polignac number, because 3912654109849 - 2⁹ = 3912654109337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (3912654109843) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 13353768147 + ... + 13353768439.

Almost surely, 2^{3912654109849} is an apocalyptic number.

3912654109849 is the 1978043-rd square number.

3912654109849 is the 989022-nd centered octagonal number.

It is an amenable number.

3912654109849 is a deficient number, since it is larger than the sum of its proper divisors (132591106244).

3912654109849 is an frugal number, since it uses more digits than its factorization.

3912654109849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986 (or 493 counting only the distinct ones).

The product of its (nonzero) digits is 16796160, while the sum is 61.

The spelling of 3912654109849 in words is "three trillion, nine hundred twelve billion, six hundred fifty-four million, one hundred nine thousand, eight hundred forty-nine".