1664194248 has 96 divisors (see below), whose sum is σ = 4693721760. Its totient is φ = 552407040.

The previous prime is 1664194247. The next prime is 1664194289. The reversal of 1664194248 is 8424914661.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a nude number because it is divisible by every one of its digits.

It is not an unprimeable number, because it can be changed into a prime (1664194241) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 497943 + ... + 501273.

It is an arithmetic number, because the mean of its divisors is an integer number (48892935).

Almost surely, 2^1664194248 is an apocalyptic number.

1664194248 is a gapful number since it is divisible by the number (18) 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 1664194248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2346860880).

1664194248 is an abundant number, since it is smaller than the sum of its proper divisors (3029527512).

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

1664194248 is a wasteful number, since it uses less digits than its factorization.

1664194248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3609 (or 3593 counting only the distinct ones).

The product of its digits is 331776, while the sum is 45.

The square root of 1664194248 is about 40794.5369871996. The cubic root of 1664194248 is about 1185.0445360605.

It can be divided in two parts, 16641 and 94248, that added together give a square (110889 = 333²).

The spelling of 1664194248 in words is "one billion, six hundred sixty-four million, one hundred ninety-four thousand, two hundred forty-eight".