2016144293978 has 32 divisors (see below), whose sum is σ = 3104335357200. Its totient is φ = 981776733696.

The previous prime is 2016144293851. The next prime is 2016144294011. The reversal of 2016144293978 is 8793924416102.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2006208789649 + 9935504329 = 1416407^2 + 99677^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4446608 + ... + 4878996.

Almost surely, 2^{2016144293978} is an apocalyptic number.

2016144293978 is a deficient number, since it is larger than the sum of its proper divisors (1088191063222).

2016144293978 is a wasteful number, since it uses less digits than its factorization.

2016144293978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 432866.

The product of its (nonzero) digits is 5225472, while the sum is 56.

The spelling of 2016144293978 in words is "two trillion, sixteen billion, one hundred forty-four million, two hundred ninety-three thousand, nine hundred seventy-eight".