321140401540 has 96 divisors (see below), whose sum is σ = 774765057024. Its totient is φ = 109531361280.

The previous prime is 321140401531. The next prime is 321140401573. The reversal of 321140401540 is 45104041123.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21292482 + ... + 21307558.

It is an arithmetic number, because the mean of its divisors is an integer number (8070469344).

Almost surely, 2^321140401540 is an apocalyptic number.

It is an amenable number.

321140401540 is an abundant number, since it is smaller than the sum of its proper divisors (453624655484).

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

321140401540 is a wasteful number, since it uses less digits than its factorization.

321140401540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15877 (or 15875 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 25.

Adding to 321140401540 its reverse (45104041123), we get a palindrome (366244442663).

The spelling of 321140401540 in words is "three hundred twenty-one billion, one hundred forty million, four hundred one thousand, five hundred forty".