64732623653 has 8 divisors (see below), whose sum is σ = 66672660600. Its totient is φ = 62802613440.

The previous prime is 64732623623. The next prime is 64732623719. The reversal of 64732623653 is 35632623746.

It can be written as a sum of positive squares in 4 ways, for example, as 44267318404 + 20465305249 = 210398^2 + 143057^2 .

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-64732623653 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64732623598 and 64732623607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64732623623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2493578 + ... + 2519403.

It is an arithmetic number, because the mean of its divisors is an integer number (8334082575).

Almost surely, 2^64732623653 is an apocalyptic number.

It is an amenable number.

64732623653 is a deficient number, since it is larger than the sum of its proper divisors (1940036947).

64732623653 is a wasteful number, since it uses less digits than its factorization.

64732623653 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5013367.

The product of its digits is 3265920, while the sum is 47.

The spelling of 64732623653 in words is "sixty-four billion, seven hundred thirty-two million, six hundred twenty-three thousand, six hundred fifty-three".