5638778365 has 16 divisors (see below), whose sum is σ = 7815890880. Its totient is φ = 3859697920.

The previous prime is 5638778317. The next prime is 5638778401.

5638778365 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 5638778365 - 2⁷ = 5638778237 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3014455 + ... + 3016324.

It is an arithmetic number, because the mean of its divisors is an integer number (488493180).

Almost surely, 2^5638778365 is an apocalyptic number.

5638778365 is a gapful number since it is divisible by the number (55) formed by its first and last digit.

It is an amenable number.

5638778365 is a deficient number, since it is larger than the sum of its proper divisors (2177112515).

5638778365 is a wasteful number, since it uses less digits than its factorization.

5638778365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6030812.

The product of its digits is 25401600, while the sum is 58.

The square root of 5638778365 is about 75091.7995855739. The cubic root of 5638778365 is about 1779.8975622781.

The spelling of 5638778365 in words is "five billion, six hundred thirty-eight million, seven hundred seventy-eight thousand, three hundred sixty-five".