5397865781 has 24 divisors (see below), whose sum is σ = 7137695040. Its totient is φ = 3984742080.

The previous prime is 5397865771. The next prime is 5397865807. The reversal of 5397865781 is 1875687935.

It is not a de Polignac number, because 5397865781 - 2²² = 5393671477 is a prime.

It is a super-2 number, since 2×5397865781² = 58273909979381479922, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 5397865781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5397865751) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 151616 + ... + 183801.

It is an arithmetic number, because the mean of its divisors is an integer number (297403960).

Almost surely, 2^5397865781 is an apocalyptic number.

It is an amenable number.

5397865781 is a deficient number, since it is larger than the sum of its proper divisors (1739829259).

5397865781 is a wasteful number, since it uses less digits than its factorization.

5397865781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 335465 (or 335454 counting only the distinct ones).

The product of its digits is 12700800, while the sum is 59.

The square root of 5397865781 is about 73470.1693274216. The cubic root of 5397865781 is about 1754.1794830563.

It can be divided in two parts, 5397 and 865781, that added together give a palindrome (871178).

The spelling of 5397865781 in words is "five billion, three hundred ninety-seven million, eight hundred sixty-five thousand, seven hundred eighty-one".