438495665656 has 8 divisors (see below), whose sum is σ = 822179373120. Its totient is φ = 219247832824.

The previous prime is 438495665651. The next prime is 438495665687. The reversal of 438495665656 is 656566594834.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 438495665591 and 438495665600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (438495665651) 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 as a sum of consecutive naturals, namely, 27405979096 + ... + 27405979111.

It is an arithmetic number, because the mean of its divisors is an integer number (102772421640).

Almost surely, 2^438495665656 is an apocalyptic number.

It is an amenable number.

438495665656 is a deficient number, since it is larger than the sum of its proper divisors (383683707464).

438495665656 is a wasteful number, since it uses less digits than its factorization.

438495665656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54811958213 (or 54811958209 counting only the distinct ones).

The product of its digits is 559872000, while the sum is 67.

The spelling of 438495665656 in words is "four hundred thirty-eight billion, four hundred ninety-five million, six hundred sixty-five thousand, six hundred fifty-six".