3144781391320 has 64 divisors (see below), whose sum is σ = 7088906772000. Its totient is φ = 1255576025088.

The previous prime is 3144781391291. The next prime is 3144781391371. The reversal of 3144781391320 is 231931874413.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 121533904 + ... + 121559776.

Almost surely, 2^{3144781391320} is an apocalyptic number.

It is an amenable number.

3144781391320 is an abundant number, since it is smaller than the sum of its proper divisors (3944125380680).

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

3144781391320 is a wasteful number, since it uses less digits than its factorization.

3144781391320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31412 (or 31408 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 46.

The spelling of 3144781391320 in words is "three trillion, one hundred forty-four billion, seven hundred eighty-one million, three hundred ninety-one thousand, three hundred twenty".