1764643968 has 160 divisors (see below), whose sum is σ = 5433565500. Its totient is φ = 567834624.

The previous prime is 1764643961. The next prime is 1764644003. The reversal of 1764643968 is 8693464671.

1764643968 is a `hidden beast` number, since 176 + 464 + 3 + 9 + 6 + 8 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1678377024 + 86266944 = 40968^2 + 9288^2 .

It is a super-2 number, since 2×1764643968² = 6227936667597570048, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (1764643961) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 297738 + ... + 303606.

Almost surely, 2^1764643968 is an apocalyptic number.

1764643968 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 1764643968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2716782750).

1764643968 is an abundant number, since it is smaller than the sum of its proper divisors (3668921532).

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

1764643968 is an equidigital number, since it uses as much as digits as its factorization.

1764643968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5924 (or 5903 counting only the distinct ones).

The product of its digits is 5225472, while the sum is 54.

The square root of 1764643968 is about 42007.6655861761. The cubic root of 1764643968 is about 1208.4231372949.

The spelling of 1764643968 in words is "one billion, seven hundred sixty-four million, six hundred forty-three thousand, nine hundred sixty-eight".