5209581365 has 16 divisors (see below), whose sum is σ = 6399643008. Its totient is φ = 4068985536.

The previous prime is 5209581359. The next prime is 5209581409. The reversal of 5209581365 is 5631859025.

It is a cyclic number.

It is not a de Polignac number, because 5209581365 - 2⁶ = 5209581301 is a prime.

It is a Duffinian number.

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, 741047 + ... + 748043.

It is an arithmetic number, because the mean of its divisors is an integer number (399977688).

Almost surely, 2^5209581365 is an apocalyptic number.

It is an amenable number.

5209581365 is a deficient number, since it is larger than the sum of its proper divisors (1190061643).

5209581365 is a wasteful number, since it uses less digits than its factorization.

5209581365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10508.

The product of its (nonzero) digits is 324000, while the sum is 44.

The square root of 5209581365 is about 72177.4297478097. The cubic root of 5209581365 is about 1733.5416287115.

The spelling of 5209581365 in words is "five billion, two hundred nine million, five hundred eighty-one thousand, three hundred sixty-five".