1326561455 has 16 divisors (see below), whose sum is σ = 1714673664. Its totient is φ = 982359840.

The previous prime is 1326561451. The next prime is 1326561461. The reversal of 1326561455 is 5541656231.

It is not a de Polignac number, because 1326561455 - 2² = 1326561451 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1326561451) 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 15 ways as a sum of consecutive naturals, for example, 182489 + ... + 189618.

It is an arithmetic number, because the mean of its divisors is an integer number (107167104).

Almost surely, 2^1326561455 is an apocalyptic number.

1326561455 is a deficient number, since it is larger than the sum of its proper divisors (388112209).

1326561455 is a wasteful number, since it uses less digits than its factorization.

1326561455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 372166.

The product of its digits is 108000, while the sum is 38.

The square root of 1326561455 is about 36421.9913651080. The cubic root of 1326561455 is about 1098.7758986321.

The spelling of 1326561455 in words is "one billion, three hundred twenty-six million, five hundred sixty-one thousand, four hundred fifty-five".