5197935681 has 6 divisors (see below), whose sum is σ = 7508129330. Its totient is φ = 3465290448.

The previous prime is 5197935671. The next prime is 5197935707. The reversal of 5197935681 is 1865397915.

5197935681 is a `hidden beast` number, since 5 + 1 + 9 + 79 + 3 + 568 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 3970134081 + 1227801600 = 63009^2 + 35040^2 .

It is not a de Polignac number, because 5197935681 - 2²⁶ = 5130826817 is a prime.

It is a super-2 number, since 2×5197935681² = 54037070687625867522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5197935641) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 288774196 + ... + 288774213.

Almost surely, 2^5197935681 is an apocalyptic number.

It is an amenable number.

5197935681 is a deficient number, since it is larger than the sum of its proper divisors (2310193649).

5197935681 is a wasteful number, since it uses less digits than its factorization.

5197935681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 577548415 (or 577548412 counting only the distinct ones).

The product of its digits is 2041200, while the sum is 54.

The square root of 5197935681 is about 72096.7106115113. The cubic root of 5197935681 is about 1732.2489247172.

The spelling of 5197935681 in words is "five billion, one hundred ninety-seven million, nine hundred thirty-five thousand, six hundred eighty-one".