320432321554 has 4 divisors (see below), whose sum is σ = 480648482334. Its totient is φ = 160216160776.

The previous prime is 320432321509. The next prime is 320432321567. The reversal of 320432321554 is 455123234023.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 455123234023 = 526543 ⋅864361.

It can be written as a sum of positive squares in only one way, i.e., 218067518529 + 102364803025 = 466977^2 + 319945^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80108080387 + ... + 80108080390.

Almost surely, 2^320432321554 is an apocalyptic number.

320432321554 is a deficient number, since it is larger than the sum of its proper divisors (160216160780).

320432321554 is a wasteful number, since it uses less digits than its factorization.

320432321554 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160216160779.

The product of its (nonzero) digits is 86400, while the sum is 34.

Adding to 320432321554 its reverse (455123234023), we get a palindrome (775555555577).

The spelling of 320432321554 in words is "three hundred twenty billion, four hundred thirty-two million, three hundred twenty-one thousand, five hundred fifty-four".