1664410172544 has 96 divisors (see below), whose sum is σ = 5473729909440. Its totient is φ = 475545761280.

The previous prime is 1664410172531. The next prime is 1664410172591. The reversal of 1664410172544 is 4452710144661.

1664410172544 is a `hidden beast` number, since 1 + 6 + 64 + 41 + 0 + 1 + 7 + 2 + 544 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1664410172544² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1664410172544.

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 11 ways as a sum of consecutive naturals, for example, 103191972 + ... + 103208099.

It is an arithmetic number, because the mean of its divisors is an integer number (57018019890).

Almost surely, 2^{1664410172544} is an apocalyptic number.

1664410172544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1664410172544 is an abundant number, since it is smaller than the sum of its proper divisors (3809319736896).

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

1664410172544 is a wasteful number, since it uses less digits than its factorization.

1664410172544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206400098 (or 206400083 counting only the distinct ones).

The product of its (nonzero) digits is 645120, while the sum is 45.

The spelling of 1664410172544 in words is "one trillion, six hundred sixty-four billion, four hundred ten million, one hundred seventy-two thousand, five hundred forty-four".