1664387926208 has 28 divisors (see below), whose sum is σ = 3774594047952. Its totient is φ = 713309111040.

The previous prime is 1664387926199. The next prime is 1664387926211. The reversal of 1664387926208 is 8026297834661.

It is a tau number, because it is divible by the number of its divisors (28).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1857575363 + ... + 1857576258.

It is an arithmetic number, because the mean of its divisors is an integer number (134806930284).

Almost surely, 2^{1664387926208} is an apocalyptic number.

It is an amenable number.

1664387926208 is an abundant number, since it is smaller than the sum of its proper divisors (2110206121744).

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

1664387926208 is an equidigital number, since it uses as much as digits as its factorization.

1664387926208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3715151640 (or 3715151630 counting only the distinct ones).

The product of its (nonzero) digits is 41803776, while the sum is 62.

The spelling of 1664387926208 in words is "one trillion, six hundred sixty-four billion, three hundred eighty-seven million, nine hundred twenty-six thousand, two hundred eight".