328355695581 has 8 divisors (see below), whose sum is σ = 447989166240. Its totient is φ = 213813010992.

The previous prime is 328355695531. The next prime is 328355695609. The reversal of 328355695581 is 185596553823.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 328355695581 - 2¹³ = 328355687389 is a prime.

It is a super-2 number, since 2×328355695581² (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 (328355695531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1272696366 + ... + 1272696623.

It is an arithmetic number, because the mean of its divisors is an integer number (55998645780).

Almost surely, 2^328355695581 is an apocalyptic number.

It is an amenable number.

328355695581 is a deficient number, since it is larger than the sum of its proper divisors (119633470659).

328355695581 is a wasteful number, since it uses less digits than its factorization.

328355695581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2545393035.

The product of its digits is 38880000, while the sum is 60.

The spelling of 328355695581 in words is "three hundred twenty-eight billion, three hundred fifty-five million, six hundred ninety-five thousand, five hundred eighty-one".