5166138091 has 2 divisors, whose sum is σ = 5166138092. Its totient is φ = 5166138090.

The previous prime is 5166138083. The next prime is 5166138101. The reversal of 5166138091 is 1908316615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 5166138091 - 2³ = 5166138083 is a prime.

It is a super-2 number, since 2×5166138091² = 53377965550562248562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5166138001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2583069045 + 2583069046.

It is an arithmetic number, because the mean of its divisors is an integer number (2583069046).

Almost surely, 2^5166138091 is an apocalyptic number.

5166138091 is a deficient number, since it is larger than the sum of its proper divisors (1).

5166138091 is an equidigital number, since it uses as much as digits as its factorization.

5166138091 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 5166138091 is about 71875.8519323423. The cubic root of 5166138091 is about 1728.7094400047.

The spelling of 5166138091 in words is "five billion, one hundred sixty-six million, one hundred thirty-eight thousand, ninety-one".