64331274593 has 4 divisors (see below), whose sum is σ = 64334856900. Its totient is φ = 64327692288.

The previous prime is 64331274569. The next prime is 64331274611. The reversal of 64331274593 is 39547213346.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 23255335009 + 41075939584 = 152497^2 + 202672^2 .

It is a cyclic number.

It is not a de Polignac number, because 64331274593 - 2³⁰ = 63257532769 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64331274533) 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, 1764080 + ... + 1800177.

It is an arithmetic number, because the mean of its divisors is an integer number (16083714225).

Almost surely, 2^64331274593 is an apocalyptic number.

It is an amenable number.

64331274593 is a deficient number, since it is larger than the sum of its proper divisors (3582307).

64331274593 is a wasteful number, since it uses less digits than its factorization.

64331274593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3582306.

The product of its digits is 1632960, while the sum is 47.

The spelling of 64331274593 in words is "sixty-four billion, three hundred thirty-one million, two hundred seventy-four thousand, five hundred ninety-three".