7896341661849 has 45 divisors (see below), whose sum is σ = 12450032510223. Its totient is φ = 4986859670208.

The previous prime is 7896341661823. The next prime is 7896341661889. The reversal of 7896341661849 is 9481661436987.

It is a happy number.

The square root of 7896341661849 is 2810043.

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

7896341661849 is a `hidden beast` number, since 78 + 9 + 6 + 3 + 416 + 61 + 84 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7802441091225 + 93900570624 = 2793285^2 + 306432^2 .

It is not a de Polignac number, because 7896341661849 - 2¹³ = 7896341653657 is a prime.

It is not an unprimeable number, because it can be changed into a prime (7896341661889) by changing a digit.

It is a polite number, since it can be written in 44 ways as a sum of consecutive naturals, for example, 480509137 + ... + 480525569.

Almost surely, 2^{7896341661849} is an apocalyptic number.

7896341661849 is the 2810043-rd square number.

7896341661849 is the 1405022-nd centered octagonal number.

It is an amenable number.

7896341661849 is a deficient number, since it is larger than the sum of its proper divisors (4553690848374).

7896341661849 is an frugal number, since it uses more digits than its factorization.

7896341661849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32916 (or 16455 counting only the distinct ones).

The product of its digits is 376233984, while the sum is 72.

The spelling of 7896341661849 in words is "seven trillion, eight hundred ninety-six billion, three hundred forty-one million, six hundred sixty-one thousand, eight hundred forty-nine".