5279397806591 has 4 divisors (see below), whose sum is σ = 5279439516384. Its totient is φ = 5279356096800.

The previous prime is 5279397806549. The next prime is 5279397806593. The reversal of 5279397806591 is 1956087939725.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 5279397806591 - 2¹⁰ = 5279397805567 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5279397806593) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20664455 + ... + 20918376.

It is an arithmetic number, because the mean of its divisors is an integer number (1319859879096).

Almost surely, 2^{5279397806591} is an apocalyptic number.

5279397806591 is a deficient number, since it is larger than the sum of its proper divisors (41709793).

5279397806591 is a wasteful number, since it uses less digits than its factorization.

5279397806591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41709792.

The product of its (nonzero) digits is 257191200, while the sum is 71.

The spelling of 5279397806591 in words is "five trillion, two hundred seventy-nine billion, three hundred ninety-seven million, eight hundred six thousand, five hundred ninety-one".