64500613533 has 12 divisors (see below), whose sum is σ = 93169800828. Its totient is φ = 42999371520.

The previous prime is 64500613511. The next prime is 64500613537. The reversal of 64500613533 is 33531600546.

64500613533 is a `hidden beast` number, since 6 + 4 + 5 + 0 + 0 + 613 + 5 + 33 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 38558035044 + 25942578489 = 196362^2 + 161067^2 .

It is not a de Polignac number, because 64500613533 - 2⁵ = 64500613501 is a prime.

It is a super-2 number, since 2×64500613533² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64500613537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 568063 + ... + 672083.

It is an arithmetic number, because the mean of its divisors is an integer number (7764150069).

Almost surely, 2^64500613533 is an apocalyptic number.

It is an amenable number.

64500613533 is a deficient number, since it is larger than the sum of its proper divisors (28669187295).

64500613533 is a wasteful number, since it uses less digits than its factorization.

64500613533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172924 (or 172921 counting only the distinct ones).

The product of its (nonzero) digits is 97200, while the sum is 36.

The spelling of 64500613533 in words is "sixty-four billion, five hundred million, six hundred thirteen thousand, five hundred thirty-three".