328812265509 has 64 divisors (see below), whose sum is σ = 568143206400. Its totient is φ = 164266382592.

The previous prime is 328812265487. The next prime is 328812265591. The reversal of 328812265509 is 905562218823.

It is not a de Polignac number, because 328812265509 - 2¹³ = 328812257317 is a prime.

It is a super-2 number, since 2×328812265509² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (328812264509) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 27604447 + ... + 27616355.

It is an arithmetic number, because the mean of its divisors is an integer number (8877237600).

Almost surely, 2^328812265509 is an apocalyptic number.

328812265509 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

328812265509 is a deficient number, since it is larger than the sum of its proper divisors (239330940891).

328812265509 is a wasteful number, since it uses less digits than its factorization.

328812265509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17274.

The product of its (nonzero) digits is 2073600, while the sum is 51.

The spelling of 328812265509 in words is "three hundred twenty-eight billion, eight hundred twelve million, two hundred sixty-five thousand, five hundred nine".