329121693842 has 18 divisors (see below), whose sum is σ = 500628045663. Its totient is φ = 162277381152.

The previous prime is 329121693839. The next prime is 329121693871. The reversal of 329121693842 is 248396121923.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 319235170081 + 9886523761 = 565009^2 + 99431^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=405661.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 59223728 + ... + 59229284.

Almost surely, 2^329121693842 is an apocalyptic number.

329121693842 is a deficient number, since it is larger than the sum of its proper divisors (171506351821).

329121693842 is an frugal number, since it uses more digits than its factorization.

329121693842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11262 (or 5632 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 50.

Multiplying 329121693842 by its sum of digits (50), we get a square (16456084692100 = 4056610²).

The spelling of 329121693842 in words is "three hundred twenty-nine billion, one hundred twenty-one million, six hundred ninety-three thousand, eight hundred forty-two".