1323155998890 has 96 divisors (see below), whose sum is σ = 3753722583936. Its totient is φ = 320699191680.

The previous prime is 1323155998841. The next prime is 1323155998919. The reversal of 1323155998890 is 988995513231.

1323155998890 is a `hidden beast` number, since 1 + 3 + 2 + 31 + 5 + 599 + 8 + 8 + 9 + 0 = 666.

It is a Curzon number.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 4772619 + ... + 5042241.

It is an arithmetic number, because the mean of its divisors is an integer number (39101276916).

Almost surely, 2^{1323155998890} is an apocalyptic number.

1323155998890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1323155998890 is an abundant number, since it is smaller than the sum of its proper divisors (2430566585046).

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

1323155998890 is a wasteful number, since it uses less digits than its factorization.

1323155998890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 274604 (or 274601 counting only the distinct ones).

The product of its (nonzero) digits is 20995200, while the sum is 63.

The spelling of 1323155998890 in words is "one trillion, three hundred twenty-three billion, one hundred fifty-five million, nine hundred ninety-eight thousand, eight hundred ninety".