64606405373 has 4 divisors (see below), whose sum is σ = 64638824028. Its totient is φ = 64573986720.

The previous prime is 64606405327. The next prime is 64606405387. The reversal of 64606405373 is 37350460646.

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 51709850404 + 12896554969 = 227398^2 + 113563^2 .

It is a cyclic number.

It is not a de Polignac number, because 64606405373 - 2⁶ = 64606405309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64606405313) 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, 16206338 + ... + 16210323.

It is an arithmetic number, because the mean of its divisors is an integer number (16159706007).

Almost surely, 2^64606405373 is an apocalyptic number.

It is an amenable number.

64606405373 is a deficient number, since it is larger than the sum of its proper divisors (32418655).

64606405373 is a wasteful number, since it uses less digits than its factorization.

64606405373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32418654.

The product of its (nonzero) digits is 1088640, while the sum is 44.

The spelling of 64606405373 in words is "sixty-four billion, six hundred six million, four hundred five thousand, three hundred seventy-three".