1326265551 has 24 divisors (see below), whose sum is σ = 2069645760. Its totient is φ = 813566016.

The previous prime is 1326265541. The next prime is 1326265553. The reversal of 1326265551 is 1555626231.

It is not a de Polignac number, because 1326265551 - 2¹⁵ = 1326232783 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326265553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19210 + ... + 54968.

It is an arithmetic number, because the mean of its divisors is an integer number (86235240).

Almost surely, 2^1326265551 is an apocalyptic number.

1326265551 is a deficient number, since it is larger than the sum of its proper divisors (743380209).

1326265551 is a wasteful number, since it uses less digits than its factorization.

1326265551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36095 (or 36092 counting only the distinct ones).

The product of its digits is 54000, while the sum is 36.

The square root of 1326265551 is about 36417.9289773595. The cubic root of 1326265551 is about 1098.6941945743.

The spelling of 1326265551 in words is "one billion, three hundred twenty-six million, two hundred sixty-five thousand, five hundred fifty-one".