52499016578 has 6 divisors (see below), whose sum is σ = 78749010921. Its totient is φ = 26249346272.

The previous prime is 52499016569. The next prime is 52499016601. The reversal of 52499016578 is 87561099425.

52499016578 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 47719091809 + 4779924769 = 218447^2 + 69137^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=162017.

It is a super-2 number, since 2×52499016578² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 243026 + ... + 405042.

Almost surely, 2^52499016578 is an apocalyptic number.

52499016578 is a deficient number, since it is larger than the sum of its proper divisors (26249994343).

52499016578 is an frugal number, since it uses more digits than its factorization.

52499016578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 324036 (or 162019 counting only the distinct ones).

The product of its (nonzero) digits is 5443200, while the sum is 56.

The spelling of 52499016578 in words is "fifty-two billion, four hundred ninety-nine million, sixteen thousand, five hundred seventy-eight".