321011516340 has 60 divisors (see below), whose sum is σ = 1007025021156. Its totient is φ = 85603070592.

The previous prime is 321011516333. The next prime is 321011516369. The reversal of 321011516340 is 43615110123.

It is a happy number.

321011516340 is a `hidden beast` number, since 3 + 2 + 10 + 1 + 15 + 1 + 634 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 95384616336 + 225626900004 = 308844^2 + 475002^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 99076009 + ... + 99079248.

Almost surely, 2^321011516340 is an apocalyptic number.

321011516340 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

321011516340 is an abundant number, since it is smaller than the sum of its proper divisors (686013504816).

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

321011516340 is a wasteful number, since it uses less digits than its factorization.

321011516340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198155278 (or 198155267 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 321011516340 its reverse (43615110123), we get a palindrome (364626626463).

The spelling of 321011516340 in words is "three hundred twenty-one billion, eleven million, five hundred sixteen thousand, three hundred forty".