1664196240280 has 64 divisors (see below), whose sum is σ = 4280453210880. Its totient is φ = 570436041600.

The previous prime is 1664196240251. The next prime is 1664196240281. The reversal of 1664196240280 is 820426914661.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664196240281) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 344695 + ... + 1856665.

It is an arithmetic number, because the mean of its divisors is an integer number (66882081420).

Almost surely, 2^{1664196240280} is an apocalyptic number.

1664196240280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1664196240280 is an abundant number, since it is smaller than the sum of its proper divisors (2616256970600).

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

1664196240280 is a wasteful number, since it uses less digits than its factorization.

1664196240280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1515920 (or 1515916 counting only the distinct ones).

The product of its (nonzero) digits is 995328, while the sum is 49.

The spelling of 1664196240280 in words is "one trillion, six hundred sixty-four billion, one hundred ninety-six million, two hundred forty thousand, two hundred eighty".