5191941985 has 8 divisors (see below), whose sum is σ = 6234523560. Its totient is φ = 4150758144.

The previous prime is 5191941977. The next prime is 5191942051. The reversal of 5191941985 is 5891491915.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 212663889 + 4979278096 = 14583^2 + 70564^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 5191941985 - 2³ = 5191941977 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 341242 + ... + 356131.

It is an arithmetic number, because the mean of its divisors is an integer number (779315445).

Almost surely, 2^5191941985 is an apocalyptic number.

It is an amenable number.

5191941985 is a deficient number, since it is larger than the sum of its proper divisors (1042581575).

5191941985 is a wasteful number, since it uses less digits than its factorization.

5191941985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 698867.

The product of its digits is 583200, while the sum is 52.

The square root of 5191941985 is about 72055.1315660446. The cubic root of 5191941985 is about 1731.5828547403.

The spelling of 5191941985 in words is "five billion, one hundred ninety-one million, nine hundred forty-one thousand, nine hundred eighty-five".