532451985665 has 4 divisors (see below), whose sum is σ = 638942382804. Its totient is φ = 425961588528.

The previous prime is 532451985649. The next prime is 532451985673. The reversal of 532451985665 is 566589154235.

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 98970643216 + 433481342449 = 314596^2 + 658393^2 .

It is a cyclic number.

It is not a de Polignac number, because 532451985665 - 2⁴ = 532451985649 is a prime.

It is a Duffinian 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 in 3 ways as a sum of consecutive naturals, for example, 53245198562 + ... + 53245198571.

It is an arithmetic number, because the mean of its divisors is an integer number (159735595701).

Almost surely, 2^532451985665 is an apocalyptic number.

It is an amenable number.

532451985665 is a deficient number, since it is larger than the sum of its proper divisors (106490397139).

532451985665 is a wasteful number, since it uses less digits than its factorization.

532451985665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106490397138.

The product of its digits is 38880000, while the sum is 59.

The spelling of 532451985665 in words is "five hundred thirty-two billion, four hundred fifty-one million, nine hundred eighty-five thousand, six hundred sixty-five".