65989389456 has 45 divisors (see below), whose sum is σ = 184687265971. Its totient is φ = 21995435616.

The previous prime is 65989389443. The next prime is 65989389469. The reversal of 65989389456 is 65498398956.

The square root of 65989389456 is 256884.

It is a perfect power (a square), and thus also a powerful number.

65989389456 is a `hidden beast` number, since 6 + 5 + 9 + 8 + 93 + 89 + 456 = 666.

It is an interprime number because it is at equal distance from previous prime (65989389443) and next prime (65989389469).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 3071905 + ... + 3093311.

Almost surely, 2^65989389456 is an apocalyptic number.

65989389456 is the 256884-th square number.

It is an amenable number.

65989389456 is an abundant number, since it is smaller than the sum of its proper divisors (118697876515).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

65989389456 is an frugal number, since it uses more digits than its factorization.

65989389456 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42828 (or 21412 counting only the distinct ones).

The product of its digits is 503884800, while the sum is 72.

The spelling of 65989389456 in words is "sixty-five billion, nine hundred eighty-nine million, three hundred eighty-nine thousand, four hundred fifty-six".