5781778365 has 32 divisors (see below), whose sum is σ = 10100474496. Its totient is φ = 2800885760.

The previous prime is 5781778351. The next prime is 5781778399. The reversal of 5781778365 is 5638771875.

It is not a de Polignac number, because 5781778365 - 2¹² = 5781774269 is a prime.

It is a super-2 number, since 2×5781778365² = 66857922123964146450, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 186409 + ... + 215201.

It is an arithmetic number, because the mean of its divisors is an integer number (315639828).

Almost surely, 2^5781778365 is an apocalyptic number.

5781778365 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5781778365 is a deficient number, since it is larger than the sum of its proper divisors (4318696131).

5781778365 is a wasteful number, since it uses less digits than its factorization.

5781778365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30029.

The product of its digits is 9878400, while the sum is 57.

The square root of 5781778365 is about 76038.0060561822. The cubic root of 5781778365 is about 1794.8182625468.

The spelling of 5781778365 in words is "five billion, seven hundred eighty-one million, seven hundred seventy-eight thousand, three hundred sixty-five".