1664964280373 has 8 divisors (see below), whose sum is σ = 1756776789600. Its totient is φ = 1573570052208.

The previous prime is 1664964280351. The next prime is 1664964280387. The reversal of 1664964280373 is 3730824694661.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1664964280373 - 2²⁰ = 1664963231797 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664964280393) 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 in 7 ways as a sum of consecutive naturals, for example, 104562086 + ... + 104578007.

It is an arithmetic number, because the mean of its divisors is an integer number (219597098700).

Almost surely, 2^{1664964280373} is an apocalyptic number.

It is an amenable number.

1664964280373 is a deficient number, since it is larger than the sum of its proper divisors (91812509227).

1664964280373 is a wasteful number, since it uses less digits than its factorization.

1664964280373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209140531.

The product of its (nonzero) digits is 31352832, while the sum is 59.

The spelling of 1664964280373 in words is "one trillion, six hundred sixty-four billion, nine hundred sixty-four million, two hundred eighty thousand, three hundred seventy-three".