5391533538 has 24 divisors (see below), whose sum is σ = 11966576076. Its totient is φ = 1753344000.

The previous prime is 5391533507. The next prime is 5391533573. The reversal of 5391533538 is 8353351935.

5391533538 is a `hidden beast` number, since 539 + 1 + 53 + 35 + 38 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 5389468569 + 2064969 = 73413^2 + 1437^2 .

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 5391533493 and 5391533502.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3652063 + ... + 3653538.

Almost surely, 2^5391533538 is an apocalyptic number.

5391533538 is an abundant number, since it is smaller than the sum of its proper divisors (6575042538).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

5391533538 is a wasteful number, since it uses less digits than its factorization.

5391533538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7305650 (or 7305647 counting only the distinct ones).

The product of its digits is 729000, while the sum is 45.

The square root of 5391533538 is about 73427.0627085137. The cubic root of 5391533538 is about 1753.4932712832.

The spelling of 5391533538 in words is "five billion, three hundred ninety-one million, five hundred thirty-three thousand, five hundred thirty-eight".