2016645331408 has 20 divisors (see below), whose sum is σ = 3915952460100. Its totient is φ = 1006076954624.

The previous prime is 2016645331403. The next prime is 2016645331427. The reversal of 2016645331408 is 8041335466102.

It can be written as a sum of positive squares in 2 ways, for example, as 1695641500224 + 321003831184 = 1302168^2 + 566572^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2016645331403) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 140349535 + ... + 140363902.

It is an arithmetic number, because the mean of its divisors is an integer number (195797623005).

Almost surely, 2^{2016645331408} is an apocalyptic number.

It is an amenable number.

2016645331408 is a deficient number, since it is larger than the sum of its proper divisors (1899307128692).

2016645331408 is a wasteful number, since it uses less digits than its factorization.

2016645331408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280713894 (or 280713888 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 43.

The spelling of 2016645331408 in words is "two trillion, sixteen billion, six hundred forty-five million, three hundred thirty-one thousand, four hundred eight".