641624000451985 has 16 divisors (see below), whose sum is σ = 832377081672000. Its totient is φ = 473140656945216.

The previous prime is 641624000451979. The next prime is 641624000451997. The reversal of 641624000451985 is 589154000426146.

It is a cyclic number.

It is not a de Polignac number, because 641624000451985 - 2⁵ = 641624000451953 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91269413335 + ... + 91269420364.

It is an arithmetic number, because the mean of its divisors is an integer number (52023567604500).

Almost surely, 2^{641624000451985} is an apocalyptic number.

It is an amenable number.

641624000451985 is a deficient number, since it is larger than the sum of its proper divisors (190753081220015).

641624000451985 is a wasteful number, since it uses less digits than its factorization.

641624000451985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 182538833760.

The product of its (nonzero) digits is 8294400, while the sum is 55.

The spelling of 641624000451985 in words is "six hundred forty-one trillion, six hundred twenty-four billion, four hundred fifty-one thousand, nine hundred eighty-five".