1326563500 has 96 divisors (see below), whose sum is σ = 2984724288. Its totient is φ = 514841600.

The previous prime is 1326563477. The next prime is 1326563551. The reversal of 1326563500 is 53656231.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2994279 + ... + 2994721.

It is an arithmetic number, because the mean of its divisors is an integer number (31090878).

Almost surely, 2^1326563500 is an apocalyptic number.

1326563500 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 1326563500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1492362144).

1326563500 is an abundant number, since it is smaller than the sum of its proper divisors (1658160788).

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

1326563500 is a wasteful number, since it uses less digits than its factorization.

1326563500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 628 (or 616 counting only the distinct ones).

The product of its (nonzero) digits is 16200, while the sum is 31.

The square root of 1326563500 is about 36422.0194387955. The cubic root of 1326563500 is about 1098.7764632486.

The spelling of 1326563500 in words is "one billion, three hundred twenty-six million, five hundred sixty-three thousand, five hundred".