5391205678609 has 9 divisors (see below), whose sum is σ = 5407510314513. Its totient is φ = 5374950077712.

The previous prime is 5391205678561. The next prime is 5391205678657. The reversal of 5391205678609 is 9068765021935.

The square root of 5391205678609 is 2321897.

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

It is an interprime number because it is at equal distance from previous prime (5391205678561) and next prime (5391205678657).

It can be written as a sum of positive squares in 4 ways, for example, as 762993515025 + 4628212163584 = 873495^2 + 2151328^2 .

It is not a de Polignac number, because 5391205678609 - 2³⁵ = 5356845940241 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5391205678669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 810338727 + ... + 810345379.

Almost surely, 2^{5391205678609} is an apocalyptic number.

5391205678609 is the 2321897-th square number.

5391205678609 is the 1160949-th centered octagonal number.

It is an amenable number.

5391205678609 is a deficient number, since it is larger than the sum of its proper divisors (16304635904).

5391205678609 is an frugal number, since it uses more digits than its factorization.

5391205678609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14004 (or 7002 counting only the distinct ones).

The product of its (nonzero) digits is 24494400, while the sum is 61.

The spelling of 5391205678609 in words is "five trillion, three hundred ninety-one billion, two hundred five million, six hundred seventy-eight thousand, six hundred nine".