5021613865 has 4 divisors (see below), whose sum is σ = 6025936644. Its totient is φ = 4017291088.

The previous prime is 5021613859. The next prime is 5021613881. The reversal of 5021613865 is 5683161205.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5683161205 = 5 ⋅1136632241.

It can be written as a sum of positive squares in 2 ways, for example, as 3827773161 + 1193840704 = 61869^2 + 34552^2 .

It is a cyclic number.

It is not a de Polignac number, because 5021613865 - 2⁹ = 5021613353 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 502161382 + ... + 502161391.

It is an arithmetic number, because the mean of its divisors is an integer number (1506484161).

Almost surely, 2^5021613865 is an apocalyptic number.

It is an amenable number.

5021613865 is a deficient number, since it is larger than the sum of its proper divisors (1004322779).

5021613865 is a wasteful number, since it uses less digits than its factorization.

5021613865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1004322778.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 5021613865 is about 70863.3464140666. The cubic root of 5021613865 is about 1712.4363507698.

The spelling of 5021613865 in words is "five billion, twenty-one million, six hundred thirteen thousand, eight hundred sixty-five".