1326161655 has 96 divisors (see below), whose sum is σ = 2876065920. Its totient is φ = 550333440.

The previous prime is 1326161647. The next prime is 1326161693. The reversal of 1326161655 is 5561616231.

1326161655 is a `hidden beast` number, since 1 + 32 + 6 + 1 + 616 + 5 + 5 = 666.

It is not a de Polignac number, because 1326161655 - 2³ = 1326161647 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 247141 + ... + 252449.

It is an arithmetic number, because the mean of its divisors is an integer number (29959020).

Almost surely, 2^1326161655 is an apocalyptic number.

1326161655 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

1326161655 is an abundant number, since it is smaller than the sum of its proper divisors (1549904265).

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

1326161655 is a wasteful number, since it uses less digits than its factorization.

1326161655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5401 (or 5398 counting only the distinct ones).

The product of its digits is 32400, while the sum is 36.

The square root of 1326161655 is about 36416.5025091647. The cubic root of 1326161655 is about 1098.6655042634.

Adding to 1326161655 its reverse (5561616231), we get a palindrome (6887777886).

The spelling of 1326161655 in words is "one billion, three hundred twenty-six million, one hundred sixty-one thousand, six hundred fifty-five".