1326135564 has 216 divisors, whose sum is σ = 3934825440. Its totient is φ = 390300768.

The previous prime is 1326135557. The next prime is 1326135583. The reversal of 1326135564 is 4655316231.

1326135564 is a `hidden beast` number, since 1 + 3 + 2 + 61 + 35 + 564 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

Its product of digits (64800) is a multiple of the sum of its prime factors (90).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 57658057 + ... + 57658079.

Almost surely, 2^1326135564 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1326135564, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1967412720).

1326135564 is an abundant number, since it is smaller than the sum of its proper divisors (2608689876).

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

1326135564 is an frugal number, since it uses more digits than its factorization.

1326135564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90 (or 41 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 1326135564 is about 36416.1442769550. The cubic root of 1326135564 is about 1098.6582991414.

The spelling of 1326135564 in words is "one billion, three hundred twenty-six million, one hundred thirty-five thousand, five hundred sixty-four".