440064661423636 has 6 divisors (see below), whose sum is σ = 770113157491370. Its totient is φ = 220032330711816.

The previous prime is 440064661423609. The next prime is 440064661423679. The reversal of 440064661423636 is 636324166460044.

It can be written as a sum of positive squares in only one way, i.e., 437769418243600 + 2295243180036 = 20922940^2 + 1515006^2 .

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 55008082677951 + ... + 55008082677958.

Almost surely, 2^{440064661423636} is an apocalyptic number.

It is an amenable number.

440064661423636 is a deficient number, since it is larger than the sum of its proper divisors (330048496067734).

440064661423636 is a wasteful number, since it uses less digits than its factorization.

440064661423636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110016165355913 (or 110016165355911 counting only the distinct ones).

The product of its (nonzero) digits is 35831808, while the sum is 55.

The spelling of 440064661423636 in words is "four hundred forty trillion, sixty-four billion, six hundred sixty-one million, four hundred twenty-three thousand, six hundred thirty-six".