5191766897 has 4 divisors (see below), whose sum is σ = 5196661236. Its totient is φ = 5186872560.

The previous prime is 5191766893. The next prime is 5191766939. The reversal of 5191766897 is 7986671915.

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 2327483536 + 2864283361 = 48244^2 + 53519^2 .

It is a cyclic number.

It is not a de Polignac number, because 5191766897 - 2² = 5191766893 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5191766893) 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, 2445578 + ... + 2447699.

It is an arithmetic number, because the mean of its divisors is an integer number (1299165309).

Almost surely, 2^5191766897 is an apocalyptic number.

It is an amenable number.

5191766897 is a deficient number, since it is larger than the sum of its proper divisors (4894339).

5191766897 is a wasteful number, since it uses less digits than its factorization.

5191766897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4894338.

The product of its digits is 5715360, while the sum is 59.

The square root of 5191766897 is about 72053.9165972260. The cubic root of 5191766897 is about 1731.5633897830.

The spelling of 5191766897 in words is "five billion, one hundred ninety-one million, seven hundred sixty-six thousand, eight hundred ninety-seven".