64942923593 has 8 divisors (see below), whose sum is σ = 66266035848. Its totient is φ = 63623432704.

The previous prime is 64942923583. The next prime is 64942923613. The reversal of 64942923593 is 39532924946.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 25878191689 + 39064731904 = 160867^2 + 197648^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64942923593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64942923523) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 869096 + ... + 940857.

It is an arithmetic number, because the mean of its divisors is an integer number (8283254481).

Almost surely, 2^64942923593 is an apocalyptic number.

It is an amenable number.

64942923593 is a deficient number, since it is larger than the sum of its proper divisors (1323112255).

64942923593 is a wasteful number, since it uses less digits than its factorization.

64942923593 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1810683.

The product of its digits is 12597120, while the sum is 56.

The spelling of 64942923593 in words is "sixty-four billion, nine hundred forty-two million, nine hundred twenty-three thousand, five hundred ninety-three".