5491166565 has 16 divisors (see below), whose sum is σ = 8789198400. Its totient is φ = 2927511552.

The previous prime is 5491166563. The next prime is 5491166587. The reversal of 5491166565 is 5656611945.

It is not a de Polignac number, because 5491166565 - 2¹ = 5491166563 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5491166561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27735 + ... + 108404.

It is an arithmetic number, because the mean of its divisors is an integer number (549324900).

Almost surely, 2^5491166565 is an apocalyptic number.

It is an amenable number.

5491166565 is a deficient number, since it is larger than the sum of its proper divisors (3298031835).

5491166565 is a wasteful number, since it uses less digits than its factorization.

5491166565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138836.

The product of its digits is 972000, while the sum is 48.

The square root of 5491166565 is about 74102.4059326011. The cubic root of 5491166565 is about 1764.2286581871.

The spelling of 5491166565 in words is "five billion, four hundred ninety-one million, one hundred sixty-six thousand, five hundred sixty-five".