64615112533 has 4 divisors (see below), whose sum is σ = 64615679788. Its totient is φ = 64614545280.

The previous prime is 64615112461. The next prime is 64615112633. The reversal of 64615112533 is 33521151646.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 33521151646 = 2 ⋅16760575823.

It can be written as a sum of positive squares in 2 ways, for example, as 34975358289 + 29639754244 = 187017^2 + 172162^2 .

It is a cyclic number.

It is not a de Polignac number, because 64615112533 - 2¹³ = 64615104341 is a prime.

It is a super-2 number, since 2×64615112533² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64615112492 and 64615112501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64615112633) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 46908 + ... + 362533.

It is an arithmetic number, because the mean of its divisors is an integer number (16153919947).

Almost surely, 2^64615112533 is an apocalyptic number.

It is an amenable number.

64615112533 is a deficient number, since it is larger than the sum of its proper divisors (567255).

64615112533 is a wasteful number, since it uses less digits than its factorization.

64615112533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 567254.

The product of its digits is 64800, while the sum is 37.

The spelling of 64615112533 in words is "sixty-four billion, six hundred fifteen million, one hundred twelve thousand, five hundred thirty-three".