5091565517 has 4 divisors (see below), whose sum is σ = 5094986460. Its totient is φ = 5088144576.

The previous prime is 5091565481. The next prime is 5091565547. The reversal of 5091565517 is 7155651905.

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

It can be written as a sum of positive squares in 2 ways, for example, as 3202880836 + 1888684681 = 56594^2 + 43459^2 .

It is a cyclic number.

It is not a de Polignac number, because 5091565517 - 2²² = 5087371213 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 (5091565547) 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, 1708238 + ... + 1711215.

It is an arithmetic number, because the mean of its divisors is an integer number (1273746615).

Almost surely, 2^5091565517 is an apocalyptic number.

It is an amenable number.

5091565517 is a deficient number, since it is larger than the sum of its proper divisors (3420943).

5091565517 is a wasteful number, since it uses less digits than its factorization.

5091565517 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3420942.

The product of its (nonzero) digits is 236250, while the sum is 44.

The square root of 5091565517 is about 71355.2066565573. The cubic root of 5091565517 is about 1720.3511898945.

The spelling of 5091565517 in words is "five billion, ninety-one million, five hundred sixty-five thousand, five hundred seventeen".