1664552263000 has 512 divisors, whose sum is σ = 4663775750400. Its totient is φ = 549126144000.

The previous prime is 1664552262907. The next prime is 1664552263007. The reversal of 1664552263000 is 3622554661.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1664552263007) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 781845936 + ... + 781848064.

Almost surely, 2^{1664552263000} is an apocalyptic number.

1664552263000 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1664552263000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2331887875200).

1664552263000 is an abundant number, since it is smaller than the sum of its proper divisors (2999223487400).

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

1664552263000 is a wasteful number, since it uses less digits than its factorization.

1664552263000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2328 (or 2314 counting only the distinct ones).

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 1664552263000 in words is "one trillion, six hundred sixty-four billion, five hundred fifty-two million, two hundred sixty-three thousand".