321550368681 has 16 divisors (see below), whose sum is σ = 430243190784. Its totient is φ = 213613017744.

The previous prime is 321550368661. The next prime is 321550368697. The reversal of 321550368681 is 186863055123.

It is not a de Polignac number, because 321550368681 - 2¹³ = 321550360489 is a prime.

It is a super-2 number, since 2×321550368681² (a number of 24 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 321550368681.

It is not an unprimeable number, because it can be changed into a prime (321550368631) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1550340 + ... + 1745466.

It is an arithmetic number, because the mean of its divisors is an integer number (26890199424).

Almost surely, 2^321550368681 is an apocalyptic number.

It is an amenable number.

321550368681 is a deficient number, since it is larger than the sum of its proper divisors (108692822103).

321550368681 is a wasteful number, since it uses less digits than its factorization.

321550368681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 197060.

The product of its (nonzero) digits is 1036800, while the sum is 48.

The spelling of 321550368681 in words is "three hundred twenty-one billion, five hundred fifty million, three hundred sixty-eight thousand, six hundred eighty-one".