1064643500 has 48 divisors (see below), whose sum is σ = 2354701440. Its totient is φ = 420451200.

The previous prime is 1064643497. The next prime is 1064643529. The reversal of 1064643500 is 53464601.

It is a happy number.

It is a super-2 number, since 2×1064643500² = 2266931564184500000, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26024 + ... + 52976.

It is an arithmetic number, because the mean of its divisors is an integer number (49056280).

Almost surely, 2^1064643500 is an apocalyptic number.

1064643500 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 1064643500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1177350720).

1064643500 is an abundant number, since it is smaller than the sum of its proper divisors (1290057940).

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

1064643500 is a wasteful number, since it uses less digits than its factorization.

1064643500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27051 (or 27039 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 1064643500 is about 32628.8752487731. The cubic root of 1064643500 is about 1021.0995127995.

It can be divided in two parts, 106 and 4643500, that multiplied together give a triangular number (492211000 = T₃₁₃₇₅).

The spelling of 1064643500 in words is "one billion, sixty-four million, six hundred forty-three thousand, five hundred".